XY Charts with Gaps in Data Do Not Display

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Create an XY chart using data with NaN as some of the values
2. Display the chart

What is the expected output? What do you see instead?

Expect to see the chart with gaps, however although the axes are present the 
chart lines are not visible.

Please provide a source code snippet that we can use to replicate the issue.

What version of the product binary library are you using?

0.7.0

Please provide any additional information below.

Issue is due to NaN becoming both min and max of the Y range in XYSeries.  
Patch is attached that fixes this issue.

Original issue reported on code.google.com by jim.g.mc...@gmail.com on 30 Mar 2012 at 3:35

Attachments:

• gaps.diff

[GoogleCodeExporter]

Just don't push NaN values to the charting engine.

Original comment by dandrome...@gmail.com on 31 Mar 2012 at 1:22

• Changed state: Invalid

[GoogleCodeExporter]

So how to create series with gaps in the data?

Seems to be a strange thing to reject given that the rest of the code has been 
specifically designed to test for and handle these values (e..g XYChart.java 
lines 265-282)...

Original comment by jim.g.mc...@gmail.com on 31 Mar 2012 at 5:35

[GoogleCodeExporter]

Use MathHelper.NULL_VALUE. See this for an example: 
http://code.google.com/p/achartengine/source/browse/trunk/achartengine/demo/org/
achartengine/chartdemo/demo/chart/SensorValuesChart.java

Original comment by dandrome...@gmail.com on 31 Mar 2012 at 8:34