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Plot2DPanel.addLinePlot plots double[] x, double[] y plots differently depending on length of array

Open GoogleCodeExporter opened this issue 10 years ago • 7 comments

What steps will reproduce the problem?
1. Plot2DPanel.addLinePlot("", new double[]{1,2,3}, new double[] {4,5,6})
2. Plot2DPanel.addLinePlot("", new double[]{1,2}, new double[] {4,5})
3.

What is the expected output? What do you see instead?
according to the arguments (String, double[] X, double[] Y), #1 should be 
plotting the follow data points(1,4), (2,5), (3,6) and #2 should plot (1,4) and 
(2,5).

This does not happen for #2. #2 plots (1,2) and (4,5).


What version of the product are you using? On what operating system?
8/2009 download, XP

Please provide any additional information below.


Original issue reported on code.google.com by [email protected] on 1 Apr 2011 at 7:46

GoogleCodeExporter avatar Mar 14 '15 13:03 GoogleCodeExporter

I've also seen this problem when adding multiple line plots to 2D and also 3D 
every now and then.  I'm trying to track down the issue that causes it.  

Currently I would guess it's when the X and Y arrays have only 2 elements.

Original comment by [email protected] on 13 Sep 2011 at 7:56

GoogleCodeExporter avatar Mar 14 '15 13:03 GoogleCodeExporter

I believe the problem is here: Plot2DCanvas.convertXY(double[]...XY)

Even though someone clearly coded this intentionally, I think this should be 
removed. It's not documented, and it's not consistent.

Original comment by [email protected] on 5 Oct 2011 at 7:22

GoogleCodeExporter avatar Mar 14 '15 13:03 GoogleCodeExporter

[deleted comment]

GoogleCodeExporter avatar Mar 14 '15 13:03 GoogleCodeExporter

[deleted comment]

GoogleCodeExporter avatar Mar 14 '15 13:03 GoogleCodeExporter

I had also this problem when I was trying to add multiple line plots. I 
experimented a lot with this bug and it only emerges in 2X2 arrays.

Original comment by [email protected] on 16 Mar 2012 at 5:04

GoogleCodeExporter avatar Mar 14 '15 13:03 GoogleCodeExporter

Great, I just wasted an entire day trying to trying to figure out why my 
plots/derivations where messed up...

It is indeed because I was throwing 2x2 arrays at addScatterPlot()...

I'd suggest raising the priority level of this issue as plotting a pair of 
points is a rather common elementary test.

Unfortunately, this broke my trust in jmathplot...

Original comment by [email protected] on 9 Oct 2013 at 2:17

GoogleCodeExporter avatar Mar 14 '15 13:03 GoogleCodeExporter

Hey guys, this is indeed a bug, and it's shame such important bug is not fixed yet. We found a workaround for now to use 2x3 instead of 2x2. How to do this? Just by duplicating end of line point - it simply works.

niddhogg avatar Feb 11 '17 11:02 niddhogg