Axis

Charts typically have two axes that are used to measure and categorize data: a vertical (y) axis, and a horizontal (x) axis.

Vertical axis always uses numerical or logarithmic scale. Horizontal(x) axis supports the following types of scale:

  • Category
  • Numeric
  • DateTime
  • DateTime Category
  • Logarithmic

Category Axis

Category axis displays the text labels instead of numbers. To use the categorical axis, you can set the valueType property of the axis to the category. Default value of valueType is double.

  • js
  • /// <reference path="../tsfiles/jquery.d.ts" />
    /// <reference path="../tsfiles/ej.web.all.d.ts" />
    
    module ChartComponent {
        $(function () {
            var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
        primaryXAxis: {
    
            //Use categorical scale in primary X axis
            valueType: 'category',         
    
            //  ...         
        },
        //  ...
     });
    });
    }

    Category Axis

    Place labels on ticks

    Labels in the category axis can be placed on the ticks by setting the labelPlacement property of axis to the onTicks. The default value of the labelPlacement property is betweenTicks i.e. labels are placed between the ticks, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
        primaryXAxis: {
    
            //Placing X-axis labels on the ticks
            labelPlacement: 'onTicks',         
    
            //  ...        
        },
        //  ...
    });

    LabelPlacement

    Display labels after a fixed interval

    To display the labels after a fixed interval n, you can set the interval property of the axis range as n. The default value of the interval is 1 i.e. all the labels are displayed.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
        primaryXAxis: {
    
            //Displaying labels after 2 intervals
            range: { interval: 2 },                
    
            //  ...        
        },
        //  ...
    });

    Range Interval

    Indexed Category Axis

    Category axis can also plot points based on index value of data points. Index based plotting can be enabled by setting isIndexed property to true in the axis.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
             // ...             
             primaryXAxis: {                                  
                 isIndexed: true
             },       
             series:[{
                 points:[{ x: "Monday", y: 50 }, { x: "Tuesday", y: 40 }, { x: "Wednesday", y: 70 },
                        { x: "Thursday", y: 60 }, { x: "Friday", y: 50 },
                        { x: "Monday", y: 40 }, { x: "Monday", y: 30 } 
                           ] 
              }],
            // ...             
         });

    Indexed Category True

    While Category axis isIndexed value false

    Indexed Category False

    Numeric Axis

    Numeric axis uses numerical scale and displays numbers as labels. To use numeric axis, you can set the valueType property of the axis to double.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
        // ...             
        primaryYAxis: {
            //Use numerical scale in primary Y axis
            valueType: 'double',        
            //  ...         
        },
        // ...             
    });

    Numeric Axis

    Customize numeric range

    To customize the range of an axis, you can use the range property of the axis to set the minimum, maximum and interval values. Nice range is calculated automatically based on the provided data, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
        // ...             
        primaryYAxis: {
    
            //Customizing Y-axis range
            range: { min: 0, max: 50 },         
    
            //  ...       
        },
        // ...             
    });

    Numeric Range

    Customizing numeric interval

    Axis interval can be customized by using the interval property of the axis range. Nice interval is calculated based on the minimum and maximum value of the provided data, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
        // ...             
        primaryYAxis: {
                  
            //Customizing Y-axis interval
            range: { interval: 5 },         
    
            //  ...         
        },
    
        // ...             
    });

    Numeric Interval

    Apply padding to the range

    Padding can be applied to the minimum and maximum extremes of the axis range by using the rangePadding property. Numeric axis supports the following types of padding

    • None
    • Round
    • Additional
    • Normal

    None

    When the value of the rangePadding property is none, padding can not be applied to the axis. This is also the default value of the rangePadding.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                  // ...             
                   primaryYAxis: {
                   
                    //Applying none as range padding
                    rangePadding: 'none',       
    
                    //  ...         
                },
    
                // ...             
            });

    None RangePadding

    Round

    When the value of rangePadding property is round, the axis range is rounded to the nearest possible value divided by the interval.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                  // ...             
                   primaryYAxis: {
                   
                    //Applying round as range padding
                    rangePadding: 'round',       
    
                    //  ...         
                },
    
                // ...             
            });

    Chart before rounding axis range

    Before Round RangePadding

    Chart after rounding axis range

    After Round RangePadding

    Additional

    When the value of the rangePadding property is additional, the axis range is rounded and an interval of the axis is added as padding to the minimum and maximum values of the range.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                  // ...             
                   primaryYAxis: {
                   
                    //Applying additional range padding
                    rangePadding: 'additional',      
    
                    //  ...         
                },
    
                // ...             
            });

    Additional RangePadding

    Normal

    When the value of the rangePadding property is normal, the padding is applied to the axis based on the range calculation.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                  // ...             
                   primaryYAxis: {
                   
                    //Applying normal range padding
                    rangePadding: 'normal',      
    
                    //  ...         
                },
    
                // ...             
            });

    Normal RangePadding

    Customizing the starting range of the axis

    By default the Y axis will be always calculated from the value 0 for column, bar, stacking column and stacking bar series types. You can modify this behavior by setting false to the property startFromZero in the axis. On setting this the axis minimum value will be calculated based on the value for the data points.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
            {
    	     //Initializing Primary Y Axis	
                primaryYAxis:
                {
                   rangePadding: "none",
    		       startFromZero: false                
                },
    			
    	     // ..
            });

    Axis Start Range

    DateTime Axis

    Date time axis uses date time scale and displays the date time values as axis labels in the specified format. To use date time axis, set the valueType property of the axis to datetime.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                  // ...             
                primaryXAxis: {
    
                    //Use date time scale in primary X axis
                    valueType: 'datetime',         
    
                    //  ...         
                },
                // ...             
            });

    DateTime Axis

    Customizing date time range

    Axis range can be customized by using the range property to set the minimum, maximum and interval values. Nice range is calculated automatically based on the provided data, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                  // ...             
                primaryXAxis: {
    
                    //Customizing X-axis date time range
                    range: { 
                        min: new Date(2000, 6, 1), 
                        max: new Date(2010, 6, 1)
                    },         
    
                    //  ...         
                },
                // ...             
            });

    DateTime Range Customization

    Date time intervals

    Date time intervals can be customized by using the interval and intervalType properties of the axis. For example, when you set interval as 2 and intervalType as years, it considers the 2 years as interval.

    Essential Chart supports the following types of interval for date time axis.

    • Days
    • Hours
    • Milliseconds
    • Minutes
    • Months
    • Seconds
    • Years
  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    
                    //Customizing X-axis date time range
                    range: { 
                        interval: 2,
                    },         
    
                     intervalType: 'years',
    
                    //  ...         
                },
                //  ...
         });

    DateTime Intervals

    Apply padding to the range

    Padding can be applied to the minimum and maximum extremes of the range by using the rangePadding property. Date time axis supports the following types of padding

    • None
    • Round
    • Additional

    None

    When the value of the rangePadding property is none, padding is applied to the axis. This is also the default value of the rangePadding.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    
                    //Applying none as range padding
                    rangePadding: 'none',
                    //  ...       
                },
                //  ...
         });

    None RangePadding

    Round

    When the value of the rangePadding property is round, the axis range is rounded to the nearest possible date time value.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    
                    //Applying round as range padding
                    rangePadding: 'round',
                    //  ...       
                },
                //  ...
         });

    Chart before rounding axis range

    Before Round RangePadding

    Chart after rounding axis range

    After Round RangePadding

    Additional

    When the value of the rangePadding property is additional, the range is rounded and date time interval of the axis are added as padding to the minimum and maximum extremes of the range.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    
                    //Applying additional as range padding
                    rangePadding: 'additional',
                    //  ...       
                },
                //  ...
         });

    Additional RangePadding

    DateTime Category Axis

    DateTime category axis takes date time value as input but behaves like category axis. This is used to display the date time values with nonlinear intervals (used to depict the business days by skipping holidays). To use date time axis, set the valueType property of the axis to datetimeCategory.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	primaryXAxis: { 
    		valueType: 'datetimeCategory', 
    		// ... 
    	}, 
    	// ... 
    });

    DateTime Category

    Customizing DateTime Category range

    Axis range can be customized by using the range property to set the minimum, maximum and interval values. Datetime category axis takes numeric input for minimum and maximum property.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    
                    range: {  //Customizing X-axis date time category range
                        min: 0, 
                        max: 4
                    },         
    
                    //  ...         
                },
                // ...             
            });

    DateTime Category Customization

    DateTime Category intervals

    Date time category intervals can be customized by using the interval and intervalType properties of the axis. For example, when you set the intervalType as months, it displays only the first label of all the months from the data.

    Essential Chart supports the following types of interval for date time category axis.

    • Days
    • Hours
    • Milliseconds
    • Minutes
    • Months
    • Seconds
    • Years
    • Auto
  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    			
                    intervalType: "months"        
                    //  ...         
                },
                // ...             
            });

    DateTime Category Intervals

    Logarithmic Axis

    Logarithmic axis uses logarithmic scale and it is very useful in visualizing when the data has values with both lower order of magnitude (eg: 10-6) and higher order of magnitude (eg: 106). To use logarithmic axis, set the valueType property of the axis to logarithmic.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    
                    //Use logarithmic scale in primary X axis
                    valueType: 'logarithmic',         
    
                    //  ...         
                },
                //  ...
          });

    Logarithmic Axis

    Customize Logarithmic range

    Logarithmic range can be customized by using the range property of the axis to change the minimum, maximum and interval values. Nice range is calculated automatically based on the provided data, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryYAxis: {
    
                    //Customizing logarithmic range
                    range: { min: 1, max: 5 },         
    
                    //  ...         
                },
                //  ...
          });

    Logarithmic Range Customization

    Logarithmic base

    Logarithmic base can be customized by using the logBase property of the axis. The default value of the logBase is 10.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
               primaryYAxis: {
    
                    //Customizing logarithmic base
                    logBase: 2,         
    
                    //  ...         
                },
                //  ...
          });

    Logarithmic Base

    Logarithmic interval

    Logarithmic axis interval can be customized by using the interval property of the axis. When the logarithmic base is 10 and logarithmic interval is 2, then the axis labels are placed at an interval of 102. The default value of the interval is 1.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
               primaryYAxis: {
    
                    //Customizing logarithmic interval
                    range: { interval: 2 },              
    
                    //  ...         
                },
                //  ...
          });

    Logarithmic Interval

    Label Format

    Format numeric labels

    Numeric labels can be formatted by using the labelFormat property. Numeric values can be formatted with n (number with decimal points), c (currency) and p (percentage) commands.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
         
               primaryXAxis: {
    
                    //Applying currency format to axis labels
                    labelFormat: 'c',
                    //  ...         
                },
                
                //  ...
          });

    Numeric Label Format

    The following table describes the result of applying some commonly used label formats on numeric values.

    Label Value Label Format property value Result Description
    1000 n1 1000.0 The Number is rounded to 1 decimal place
    1000 n2 1000.00 The Number is rounded to 2 decimal place
    1000 n3 1000.000 The Number is rounded to 3 decimal place
    0.01 p1 1.0% The Number is converted to percentage with 1 decimal place
    0.01 p2 1.00% The Number is converted to percentage with 2 decimal place
    0.01 p3 1.000% The Number is converted to percentage with 3 decimal place
    1000 c1 $1,000.0 The Currency symbol is appended to number and number is rounded to 1 decimal place
    1000 c2 $1,000.00 The Currency symbol is appended to number and number is rounded to 2 decimal place

    Format date time values

    Date time labels can be formatted by using the labelFormat property of the axis.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                primaryXAxis: {
    
                    //Formatting date time labels in date/Month name/Year format
                    labelFormat: 'dd/MMMM/yyyy',
                    //  …         
                },
                //  ...
         });

    DateTime Label Format

    The following table describes the result of applying some common date time formats to the labelFormat property

    Label Value Label Format Property Value Result Description
    new Date(2000, 03, 10) dddd Monday The Date is displayed in day format
    new Date(2000, 03, 10) MM/dd/yyyy 04/10/2000 The Date is displayed in month/date/year format
    new Date(2000, 03, 10) n3 1000.000 The Number is rounded to 3 decimal place
    new Date(2000, 03, 10) MMM Apr The Shorthand month for the date is displayed
    new Date(2000, 03, 10) t 12:00 AM Time of the date value is displayed as label
    new Date(2000, 03, 10) hh:mm:ss 12:00:00 The Label is displayed in hours:minutes:seconds format

    Custom label format

    Prefix and suffix can be added to the category labels by using the labelFormat property. You can use the {value} as placeholder text in your custom text, it is replaced with the corresponding axis label at the runtime.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
        primaryXAxis: {
            //...
            //Adding prefix and suffix to axis labels
            labelFormat: '${value} K',                 
        },
        //...
    });

    LabelFormat Customization

    Common axis features

    Customization of features such as axis crossing, title, labels, grid lines and tick lines are common to all the axis. Each of these features are explained in this section.

    Axis Crossing

    Axis can be positioned anywhere in chart area using the crossesAt property of axis. This property specifies where the horizontal axis should intersect or cross the vertical axis and vice versa. Default value of crossesAt property is null.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
    		primaryXAxis:
    		{
    			//Crosses primary Y axis at 0
    			crossesAt: 0,
    
    			//...
    		},	
    	});

    CrossesAt

    Crossing a specific Axis

    The crossesInAxis property takes axis name as input and determines the axis used for crossing. By default all the horizontal axes crosses in primary Y axis and all the vertical axes crosses in primary X axis.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
    		primaryXAxis:
    		{
    			//Crosses vertical axis at -0.2
    			crossesAt: -0.2,
    
    			//Crosses in secondary Y axis
    			crossesInAxis: 'secondaryYAxis',
    
    
    			//...
    		},	
    
    		//Vertical axis for crossing
    		axes: [{
    			orientation: 'vertical',
    			name: 'secondaryYAxis',
    
    			//...
    		}],
    	});

    CrossesInAxis

    Axis will be placed in the opposite side if value of crossesAt property is greater than the maximum value of crossing axis (axis name provided through crossesInAxis property or primary Y axis for horizontal axis).

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
    		primaryXAxis:
    		{
    			//Crosses primary Y axis at 200
    			crossesAt: 200,
    
    			//...
    		},	
    	});

    Axis Crossing Opposite

    Crossing in DateTime Axis

    For crossing in a date time horizontal axis, date object should be provided as value for crossesAt property of vertical axes.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
    		primaryYAxis:
    		{
    			//Crosses horizontal axis at 5/29/2010
    			crossesAt: new Date(2010, 4, 29),
    
    			//...
    		}
    		//...
    	});

    DateTime CrossesAt

    Crossing in Category Axis

    For crossing in a category type horizontal axis, either a string object or a number corresponding to the index of category value can be used for crossesAt property of vertical axes.

    WARNING

    String value provided for crossesAt property is case-sensitive.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
    		primaryYAxis:
    		{
    			//Crosses horizontal axis at category value ‘Third’
    			crossesAt: 'Tuesday',
    
    			//...
    		}
    		//...
    	});

    Category CrossesAt

    Positioning the axis elements while crossing

    The showNextToAxisLine property is used for controlling the axis elements movement along with the axis line while axis crossing is performed. When the showNextToAxisLine is set as false only the axis line and the tick lines are placed at the crossing Value and the axis elements will be placed outside the chart area. The default value of showNextToAxisLine is true.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
    		primaryXAxis:
    		{
                //Crosses primary Y axis at 0
    			crossesAt: 0,
                showNextToAxisLine:false,
    			//...
    		}
    		//...
    	});

    The axis is placed at the crossing value without the axis elements

    Axis Elements Positioning

    Axis Visibility

    Axis visibility can be controlled by using the visible property of the axis. The default value of the visible property is true.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
               primaryYAxis: {
                       
                    //Disabling visibility of Y-axis
                    visible: false
    
                    //  ...         
                },
                //  ...
         });

    Axis Visibility

    Axis title

    The title property in the axis provides options to customize the text and font of the axis title. Axis does not display the title, by default. Title text can also be trimmed based on the title text length or specified length.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
               primaryXAxis: {
                          
                    //Customizing axis title
                    title : {
                        text : 'Month',
                        font : {
                            fontFamily : 'Segoe UI',
                            size : '16px',
                            fontWeight : 'bold' ,
                            color : 'Grey',
                        },
                        enableTrim : true,  
                        maximumTitleWidth : 80 
                    }
                    //  ...         
                },
    
                //  ...
         });

    Axis Title

    You can modify the position of the axis title either inside or outside the chart area using the property [position]. By default, it will be placed outside the chart area. In addition, you can also change the alignment of the title to near, far and center by [alignment] property, using [offset] property you can change the position with respect to pixels.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
               primaryXAxis: {
                          
                    //Customizing axis title
                    title : {
                        text : 'Month',
                        position:'inside',
                        alignment:'near',
                        offset: 10
                    }
                    //  ...         
                },
    
                //  ...
         });

    AxisTitle Customization

    Label customization

    The font property of the axis provides options to customize the font-family, color, opacity, size and font-weight of the axis labels.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
              primaryXAxis: {
    
                    //Customizing label appearance
                    font : {
                            fontFamily : 'Segoe UI',
                            size : '14px',
                            fontWeight : 'bold' ,
                            color : 'blue',
                    },                
                    //  ...         
                },
    
                //  ...
         });

    Label Customization

    Label and tick positioning

    Axis labels and ticks can be positioned inside or outside the chart area by using the labelPosition and tickPosition properties. The labels and ticks are positioned outside the chart area, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
                 primaryXAxis: {
    
                    //Customizing label and tick positions
                    labelPosition : 'inside',
                    tickLinesPosition : 'inside',
    
                    //  ...         
                },
                //  ...
         });

    Label and TickLines Positioning

    Edge labels placement

    Labels with long text at the edges of an axis may appear partially outside the chart. The edgeLabelPlacement property can be used to avoid the partial appearance of the labels at the corners.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
                 primaryXAxis: {
    
                    //Customizing edge label placement
                    edgeLabelPlacement : 'shift',
                    //  ...         
                },
                //  ...
         });

    Chart before setting edge label placement to X-axis

    Before EdgeLabel Placement

    Chart after setting edge label placement to X-axis

    After EdgeLabel Placement

    Grid lines customization

    The majorGridLines and minorGridLines properties in the axis are used to customize the major grid lines and minor grid lines of an axis. They provide options to change the width, color, visibility and opacity of the grid lines. The minor grid lines are not visible, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
              primaryXAxis: {
    
                    //Customizing grid lines
                    majorGridLines : {
                        color : 'blue',                    
                        visible : true,  
                        width : 1 
                    },
                    minorTicksPerInterval: 0,
                    minorGridLines : {
                        color : 'red',                    
                        visible : false,  
                        width : 1 
                    }
                }
                //  ...
         });

    GridLines Customization

    Tick lines customization

    The majorTickLines and minorTickLines properties in the axis are used to customize the major tick lines of an axis and minor tick lines of an axis. They provide options to change the width, size, color and visibility of the grid lines. The minor tick lines are not visible, by default.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
               primaryXAxis: {
    
                    //Customizing tick lines
                    majorTickLines : {
                        color : 'blue',                    
                        visible : true,  
                        width : 1 ,
                        size : 5,
                    },
                    minorTicksPerInterval: 0,
                    minorTickLines : {
                        color : 'red',                    
                        visible : false,  
                        width : 1 ,
                        size : 5
                    }
                    //  ...
                 }
                //  ...
         });

    TickLines Customization

    Inversing axis

    Axis can be inversed by using the isInversed property of the axis. The default value of the isInversed property is false.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
               primaryXAxis: {
    
                    //Inversing the X-axis
                    isInversed: false
    
                    //  ...         
                },
                //  ...
         });

    Chart before inversing the axes

    Before Axis Inverse

    Chart after inversing the axes

    After Axis Inverse

    Place axes at the opposite side

    The opposedPosition property of axis can be used to place the axis at the opposite side of its default position. The default value of the opposedPosition property is false.

  • javascript
  • $("#chartContainer").ejChart({
    
                primaryXAxis: {
    
                    //Placing axis at the opposite side of its normal position
                    opposedPosition: true
    
                    //  ...         
                },
                //  ...
         });

    Chart with X and Y axes at normal position

    Axis Normal Position

    Chart with Y-axis at opposed position

    Axis Opposed Position

    Maximum number of labels per 100 pixels

    A maximum of 3 labels are displayed for each 100 pixels in the axis, by default. The maximum number of labels that is present within the 100 pixels length can be customized by using the maximumLabels property of the axis. This property is applicable only for an automatic range calculation and it does not work when you set the value for interval property in the axis range.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
             primaryXAxis: {
    
                    //Maximum number of labels per 100 pixels
                    maximumLabels : 1
    
                    //  ...        
                },
                //  ...
         });

    Chart before setting maximum labels per 100 pixels

    Before Maximum Labels

    Chart after setting maximum labels one per 100 pixels

    After Maximum Labels

    Multiple Axis

    Multiple axes can be used in the Chart and chart area can be split into multiple panes to draw multiple series with multiple axes.

    Multiple Axis

    An additional horizontal or vertical axis can be added to the chart by adding an axis instance to the axes collection and then you can associate it to a series by specifying the name of the axis to the xAxisName or yAxisName property of the series.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                // ...             
               //  Creating a secondary horizontal axis
                axes: [{
                    name : 'SecondaryX',
                    //  ...         
                },{
                    name : 'SecondaryY',
                    //  ...        
                }],
                //  ...
                series: [{
                    //  Binding secondary X-axis with a series
                    xAxisName : 'SecondaryX',
    
                   //  Binding secondary Y-axis with a series
                    yAxisName : 'SecondaryY',
                    //  …
                },
                {
                    //  ...         
                }],
    
                // ...             
    
            });

    Multiple Axes

    Smart Axis Labels

    When the Axis labels overlap with each other based on the chart dimensions and label size, you can use the labelIntersectAction property of the axis to avoid overlapping. The default value of the labelIntersectAction is none. The other available values of the Label Intersect Actions are rotate45, rotate90, trim, multipleRows, wrap, wrapByWord and hide.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    
                // Avoid overlapping of x-axis labels
                primaryXAxis: {
                    labelIntersectAction : 'multipleRows',
                     //  ...
                },
                
                // ...
            });

    Smart Axes Labels

    The following screenshot displays the result, when the labelIntersectAction property is set as rotate45.

    Rotate45

    The following screenshot displays the result, when the labelIntersectAction property is set as rotate90.

    Rotate90

    The following screenshot displays the result, when the labelIntersectAction property is set as wrap.

    Wrap

    The following screenshot displays the result, when of setting the trim as value to the labelIntersectAction property.

    Trim

    The following screenshot displays the result, when the labelIntersectAction property is set as hide.

    Hide

    The following screenshot displays the result, when the labelIntersectAction property is set as **multipleRows **.

    MultipleRows

    The following screenshot displays the result, when the labelIntersectAction property is set as wrapByWord.

    WrapByWord

    Multi-level Labels

    Axis can be customized with multiple levels of labels using the [multiLevelLabels] property. These labels are placed based on the start and end range values and we can add any number of labels to an axis.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                {
                    primaryXAxis:
                    {
                        multiLevelLabels: [
                            { 
                                visible: true,
                                start: -0.5,
                                end: 2.5,
                                text: "Quater1"
                             }]
                        }    
                 });

    MultiLevel Labels

    Customizing the multi-Level labels

    The color, width and type of the border can be customized. The default border type is [Rectangle]. And the other supported border types are namely brace, curly brace, without top/bottom border and none.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                {
                    primaryXAxis:
                    {
                        multiLevelLabels: [
                            { 
                               // customizing the border properties 
                                border:{
                                    type: "brace",
                                    width: 2,
                                    color: "black"
                               }
                             }]
                        }    
                 });

    MultiLevelLabels Border

    The text of the labels can be customized using the [text] and [font] properties

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                {
                    primaryXAxis:
                    {
                        multiLevelLabels: [
                            { 
                               // customizing the text and font properties
                                text: "Year - 2015",
                                font:{
                                   fontFamily: "Algerian", 
                                   size: "12px",
                                   color: "black"                            
                                  }
                             }]
                        }    
                 });

    MultiLevelLabels Font

    You can change the alignment of the text to far, near and center position using the [textAlignment] property. By default, the text will be center aligned.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                {
                    primaryXAxis:
                    {
                        multiLevelLabels: [
                            { 
                              // customizing the text alignment
                                textAlignment: "far",
                             }]
                        }    
                 });

    MultiLevelLabels Alignment

    You can trim, wrap or wrapAndTrim the text if it exceeds the maximum text width value using the property [textOverflow]

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                {
                    primaryXAxis:
                    {
                        multiLevelLabels: [
                            { 
                              // customizing the text overflow  
                                textOverflow: trim", 
                                maximumTextWidth: 40                                                                   
                          }]
                         }  
                  });

    The below screenshot shows the trimmed multi-level labels

    MultiLevelLabels Overflow

    And these labels can be placed in various rows using the [level] property.