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# JFreeChart: Fill in XYPlot

Posted on 2011-02-21
Medium Priority
1,417 Views
Two images, first is what I have, second is what I want.
This is an XYPlot with 5 XYSeries (a sine function and 4 lines).
How do I fill in an area as shown in the second image.
Assume I know the 4 (x,y) coordinates defining the parallelogram.

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Question by:allelopath
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LVL 27

Expert Comment

ID: 34945815
I believe that this sort of thing is done with overlaying 2 plots.  The second one would only have the fill in the section you want.
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LVL 47

Accepted Solution

for_yan earned 1000 total points
ID: 34945914
In JFreeChart there is an AreaChart wich would fill in with some color
area under the chartlike in this example:
http://www.roseindia.net/chartgraphs/area-chart.shtml
But in this case does not seem to be very simple to use it.
Maybe there is something more suimple in JFreeChart, another option is to combine
JFreeChart with Graphics2d - which can be done
combining the info in these two simple
examples:

You can fill in any area/path in Graphics2D:
http://stackoverflow.com/questions/3657460/fill-an-area-inside-two-cubiccurve2d-float-s-and-a-line

And you can combine it with waht you drew in JFreeChart:
http://stackoverflow.com/questions/4196853/decorating-a-jfreechart

There probably should be something more simple within JFreeChart.

0

LVL 1

Author Comment

ID: 34946175
Thinking about this more. What I would ultimately like is as below. Basically, its an area bounded by functions. One function is the sine wave, Two are the diagonal lines and the last is just the bottom of the chart. I could create a horizontal line function to bound the bottom. So the question really is:

How do I fill in an area whose boundary is defined by a set of functions?

chart-fill.png
0

LVL 47

Expert Comment

ID: 34946244
With Graphics2D you still can do it even if you will want to create
a sufficient number of points on the sine part of the path to make sure it looks nice.

Can you do it with JFreeChart?
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LVL 92

Assisted Solution

objects earned 1000 total points
ID: 34947101
0

LVL 1

Author Comment

ID: 35047048
I haven't had time to work on this. I will close the question and post again if need be.
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