iReport displays too many labels on x axis - jasper-reports

Question

Good morning! I'm having a problem with Jaspersoft iReport 4.5.0, and I was hoping for some help. Basically, when I display an xy line chart, it's attempting to add a label on the x-axis for each data point. I have almost 200 data points, so this ends up looking like just a solid line, even if I tweak the rotation of the tick labels or whatever.
I'm aware that the general response to this question is to use a timeseries chart instead. This would ordinarily work, but in my instance I am using a multi-axis chart where the opposite axis is a bar chart. Since a bar chart has no timeseries variety, iReport will not allow me to mix a bar chart with a timeseries chart, forcing me to use the xy line chart.
Is there any way I can have my cake and eat it, too? Some way I can filter out some of the labels? Or perhaps limit the number of labels that can be displayed, spread out over the x-axis? I have yet to see a definitive answer anywhere on the internet!
Thanks in advance!
- Ian
EDIT: Here is the jrxml for one of the multi-axis charts I'd like to modify:
<multiAxisChart>
<chart evaluationTime="Report" hyperlinkType="LocalAnchor">
<reportElement x="42" y="441" width="440" height="292"/>
<chartTitle position="Top">
<titleExpression><![CDATA["CICS Elapsed"]]></titleExpression>
</chartTitle>
<chartSubtitle/>
<chartLegend/>
<anchorNameExpression><![CDATA["CICS Elapsed Small"]]></anchorNameExpression>
<hyperlinkAnchorExpression><![CDATA["CICS Elapsed Big"]]></hyperlinkAnchorExpression>
<hyperlinkTooltipExpression><![CDATA["Click to Enlarge"]]></hyperlinkTooltipExpression>
</chart>
<multiAxisPlot>
<plot/>
<axis position="leftOrTop">
<lineChart>
<chart>
<reportElement x="0" y="0" width="0" height="0" backcolor="#FFFFFF"/>
<chartTitle position="Top" color="#000000">
<titleExpression><![CDATA["CICS Elapsed"]]></titleExpression>
</chartTitle>
<chartSubtitle color="#000000"/>
<chartLegend textColor="#000000" backgroundColor="#FFFFFF"/>
</chart>
<categoryDataset>
<dataset>
<datasetRun subDataset="wmprod_cics"/>
</dataset>
<categorySeries>
<seriesExpression><![CDATA["Cpu Time"]]></seriesExpression>
<categoryExpression><![CDATA[$F{TIMESTAMP}]]></categoryExpression>
<valueExpression><![CDATA[$F{ELAPSTIME}]]></valueExpression>
</categorySeries>
</categoryDataset>
<linePlot isShowShapes="false">
<plot/>
<categoryAxisLabelExpression><![CDATA["Date/Time"]]></categoryAxisLabelExpression>
<valueAxisLabelExpression><![CDATA["Avg Elapsed Time (ms)"]]></valueAxisLabelExpression>
</linePlot>
</lineChart>
</axis>
<axis position="rightOrBottom">
<barChart>
<chart>
<reportElement x="0" y="0" width="0" height="0" backcolor="#FFFFFF"/>
<chartTitle position="Top" color="#000000">
<titleExpression><![CDATA["CICS Elapsed"]]></titleExpression>
</chartTitle>
<chartSubtitle color="#000000"/>
<chartLegend textColor="#000000" backgroundColor="#FFFFFF"/>
</chart>
<categoryDataset>
<dataset>
<datasetRun subDataset="wmprod_cics"/>
</dataset>
<categorySeries>
<seriesExpression><![CDATA["Volume (transactions)"]]></seriesExpression>
<categoryExpression><![CDATA[$F{TIMESTAMP}]]></categoryExpression>
<valueExpression><![CDATA[$F{TRANSCOMPL}]]></valueExpression>
</categorySeries>
</categoryDataset>
<barPlot>
<plot/>
<itemLabel/>
<valueAxisLabelExpression><![CDATA["Volume (transactions)"]]></valueAxisLabelExpression>
</barPlot>
</barChart>
</axis>
</multiAxisPlot>
</multiAxisChart>

Answer 1

I had the same problem. I think the answer is this:
<chart>
<reportElement x="0" y="0" width="802" height="215">
<property name="net.sf.jasperreports.chart.domain.axis.tick.interval" value="1"/>
</reportElement>
Set the tick interval as appropriate. Note: My chart was a scatter chart. Untested with line chart.