Setting line chart to start with Zero

[Paul1309]

Hello

i have created an JFreeChart object with

JFreeChart LineChartObjectDistSum=ChartFactory.createLineChart

and everythign works fine - but just one smaller thing.
The final chart doesnt start on (0,0) but on (x,0) so the line
is moved to right .

Soo is there a way to move it to the left?

thx

[paradoxoff]

The signature of the ChartFactory methoda that you are using indicates that you are using a CategoryPlot. With the default line renderer for a CategoryPlot, the line that is connecting the data points will start in the "center" of the category. I do not know a simple way to change that.

[Paul1309]

Hello

yes you are right. I am using the following

CategoryPlot plotDistSum= (CategoryPlot) LineChartObjectDistSum.getPlot();
plotDistSum.setBackgroundPaint(Color.white);
plotDistSum.setRangeGridlinePaint(Color.black);
plotDistSum.getRenderer().setSeriesPaint(0, Color.BLACK);


i would like to add a picture but doesnt know how to do here

[paradoxoff]

i would like to add a picture but doesnt know how to do here

An image is not needed. As explained above, the line renderer of a CategoryPlot will never start at the left edge of the plot. It will always connect the centers of the categories. Eventually (if you have multiple series and the useSeriesOffset falg is set to true), the line segments are slightly shifted away from the center, but never completely to the start or end of a category.

[Paul1309]

many thanks for you reply.
is there another way how to code it to get what i want?

[paradoxoff]

Only by creating a new renderer.
You could extend org.jfree.chart.renderer.category.LineAndShapeRenderer and override the drawItem method. In your overriden method, replace the occurences of domainAxis.getCategoryMiddle with domainAxis.getCategoryStart.
But your requirement sounds a bit strange to me. I have the impression that you might be better off with an XYPlot. Maybe you can upload an image of your and post a link here.

[Paul1309]

ok thanks,
i will try a XYPlot and maybe it will fit my needs

Thanks for your help

[trollini]

If i remember well it might be a way but i cant remember, i am pretty sure i saw it like 3 months ago or so.. i will look up for it
peliculas por mega

Greetings