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This topic contains 2 replies, has 2 voices, and was last updated by  Budsy 12 years, 2 months ago.

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    Axis scaling issue Posts
  • July 18, 2012 at 5:52 am Axis scaling issue #6093

    Budsy
    Member

    I must be doing something wrong. I have a spline chart combined with a columnar bar chart. The minValue and maxValue are set the same for each. However–as an example of my problem– the value 34 on the bar chart is reaching a different height than the same value 34 on the curve. There must be some kind of scaling going on? What technique should I use to make the values on the Y axix match so that the two data sets match values on the graph grid?

    July 18, 2012 at 10:30 am Axis scaling issue #6103

    Peter Stoev
    Keymaster

    Hi Budsy,

    I’ve prepared for you a small sample with Column and Spline chart series. 

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html lang="en">
    <head>
        <link rel="stylesheet" href="../../jqwidgets/styles/jqx.base.css" type="text/css" />
        <script type="text/javascript" src="../../scripts/jquery-1.7.2.min.js"></script>
        <script type="text/javascript" src="../../jqwidgets/jqxcore.js"></script>
        <script type="text/javascript" src="../../jqwidgets/jqxdata.js"></script>
        <script type="text/javascript" src="../../jqwidgets/jqxchart.js"></script>
        <script type="text/javascript">
            $(document).ready(function () {
                // prepare chart data as an array
                var sampleData = [
                        { Day: 'Monday', Running: 30, Swimming: 0, Cycling: 25, Goal: 40 },
                        { Day: 'Tuesday', Running: 25, Swimming: 25, Cycling: 0, Goal: 50 },
                        { Day: 'Wednesday', Running: 30, Swimming: 0, Cycling: 25, Goal: 60 },
                        { Day: 'Thursday', Running: 20, Swimming: 20, Cycling: 25, Goal: 40 },
                        { Day: 'Friday', Running: 0, Swimming: 20, Cycling: 25, Goal: 50 },
                        { Day: 'Saturday', Running: 30, Swimming: 0, Cycling: 30, Goal: 60 },
                        { Day: 'Sunday', Running: 20, Swimming: 40, Cycling: 0, Goal: 90 }
                    ];
                // prepare jqxChart settings
                var settings = {
                    title: "Fitness & exercise weekly scorecard",
                    description: "Time spent in vigorous exercise by activity",
                    enableAnimations: true,
                    showLegend: true,
                    padding: { left: 5, top: 5, right: 5, bottom: 5 },
                    titlePadding: { left: 90, top: 0, right: 0, bottom: 10 },
                    source: sampleData,
                    categoryAxis:
                        {
                            text: 'Category Axis',
                            textRotationAngle: 0,
                            dataField: 'Day',
                            showTickMarks: true,
                            tickMarksInterval: 1,
                            tickMarksColor: '#888888',
                            unitInterval: 1,
                            showGridLines: false,
                            gridLinesInterval: 1,
                            gridLinesColor: '#888888',
                            axisSize: 'auto'
                        },
                    colorScheme: 'scheme01',
                    seriesGroups:
                        [
                            {
                                type: 'column',
                                columnsGapPercent: 100,
                                seriesGapPercent: 5,
                                valueAxis:
                                {
                                    unitInterval: 10,
                                    minValue: 0,
                                    maxValue: 100,
                                    displayValueAxis: true,
                                    description: 'Time in minutes',
                                    axisSize: 'auto',
                                    tickMarksColor: '#888888',
                                    gridLinesColor: '#777777'
                                },
                                series: [
                                        { dataField: 'Running', displayText: 'Running', opacity: 0.5 }
                                    ]
                            },
                            {
                                type: 'spline',
                                valueAxis:
                                {
                                    unitInterval: 10,
                                    minValue: 0,
                                    maxValue: 100,
                                    displayValueAxis: false,
                                    description: 'Goal in minutes',
                                    axisSize: 'auto',
                                    tickMarksColor: '#888888'
                                },
                                series: [
                                        { dataField: 'Running', displayText: 'Running' }
                                    ]
                            }
                        ]
                };
                // setup the chart
                $('#jqxChart').jqxChart(settings);
            });
        </script>
    </head>
    <body class='default'>
        <div id='jqxChart' style="width:680px; height:400px">
        </div>
    </body>
    </html>

    If the sample does not help you, would you send a sample to support@jqwidgets.com, so we can debug your application scenario. Thanks in advance.

    Best Wishes,
    Peter Stoev

    jQWidgets Team
    http://www.jqwidgets.com

    July 18, 2012 at 8:46 pm Axis scaling issue #6123

    Budsy
    Member

    Thanks! Yes, this helped. I was using the stackedcolumn instead of the column graph type. That was my mistake, since I was only supplying the stackedcolumn with one data value. That caused it to always show a zero baseline, and it ignored the minValue. Now my graph displays correctly, with both graphs using the same Y-axis values correctly.

    Budsy

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