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  yAxis repeating ticks
Posted by Rich on Mar-26-2014 04:19
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Hi,

Can you help me understand why the primary Y Axis (left) is repeating values?
I have a similar chart with nearly identical dataset and it is not doing it, I know I am over looking something silly.

I've attached a screenshot of the chart, and below is my code.

Thanks!
Rich


<cfscript>

cd = CreateObject("java", "ChartDirector.CFChart");

labels = variables.FailureCatLabels;

      for (i = 1; i LTE ListLen(variables.keylist); i = i + 1)
           if (i EQ 1)
            lineData = cd.ArrayMath(#variables['dataSet' & i]#);
           else
              lineData.add(#variables['dataSet' & i]#);

//accumulate the data
lineData.acc();
scaleFactor = lineData.max() / 100;
if (scaleFactor EQ 0) {
    // Avoid division by zero error for zero data
    scaleFactor = 1;
}
lineData.div2(scaleFactor);

c = cd.XYChart(#variables.ChartWidth#, 550);

title = c.addTitle("Failure Category Analysis", "Arial Bold", 12);
title.setMargin2(0, 0, 12, 0);

c.addLegend(50, title.getHeight(), False, "Arial", 8).setBackground(cd.Transparent);

c.setPlotArea(50, 60, c.getWidth() - 100, c.getHeight() - 100);

lineLayer = c.addLineLayer2();

lineLayer.addDataSet(lineData.result(), "0x000000").setDataSymbol(cd.CircleShape, 7, "0x000000", "0x000000");

lineLayer.setLineWidth(1);

lineLayer.setUseYAxis2();

lineLayer.setHTMLImageMap("", "", "title='Top {={x}+1} items: {value|2}%'");

barLayer = c.addBarLayer2(cd.Stack);
barLayer.setBarGap(0.5);

      for (i = 1; i LTE ListLen(variables.keylist); i = i + 1)
          barlayer.addDataSet(#variables['dataSet' & i]#, -1, #variables['dataSetNames' & i]#);

barLayer.setBorderColor(cd.Transparent, cd.softLighting(cd.Right));

barLayer.setHTMLImageMap("", "", "title='{xLabel}: {value} occurrences in {dataSetName}'");

c.xAxis().setLabels(labels);
c.xAxis().setLabelStyle("Arial","8","000000","45");

if (scaleFactor LE 0.04) {
    c.yAxis2().setLinearScale(0, 100, 1 / scaleFactor);
    c.yAxis2().setLabelFormat("{value|0}%");
    c.yAxis().setLinearScale(0, 100 * scaleFactor, 1);
} else {
    c.yAxis2().setLinearScale(0, 100, 20);
}

c.yAxis2().setLabelFormat("{value}%");

c.yAxis().setLabelFormat("{value|0}");

c.yAxis().setTitle("Frequency", "Times New Roman Bold Italic", 12);
c.yAxis2().setTitle("Cumulative Percentage", "Times New Roman Bold Italic", 12);

c.xAxis().setColors(cd.Transparent);
c.yAxis().setColors(cd.Transparent);
c.yAxis2().setColors(cd.Transparent);

c.packPlotArea(10, title.getHeight() + c.layoutLegend().getHeight(), c.getWidth() - 10, c.getHeight() - 20);

chart1URL = c.makeSession(GetPageContext(), "chart1", cd.JPG);

imageMap1 = c.getHTMLImageMap("index.cfm?drill=byCat&xlabelFrom=Cat&#attributes.SelectedParams#");

</cfscript>
Chart_Example1.JPG

  Re: yAxis repeating ticks
Posted by Peter Kwan on Mar-27-2014 01:51
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Hi Rich,

The label values on the y-axis are 0, 0.2, 0.4, 0.6, 0.8, 1.0, .... Because you format the
numbers with 0 decimal place, so the formatted text string is 0, 0, 0, 1, 1, 1, ....

Note that formatting a number only affects the visual display of the number. It would not
change the number of labels (just like formatting a field in an SQL query would not change
the number of rows returned). If you want the y-axis labels to be at most 1 unit apart,
please use:

c.yAxis().setMinTickInc(1);

Hope this can help.

Regards
Peter Kwan

  Re: yAxis repeating ticks
Posted by Rich on Mar-27-2014 01:57
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Peter,

Thank you very much.  That resolved my issue.

Thanks again!
Rich