DPlot

Hello,

I'm running the latest version (2.2.9.4) of DPlot.
I imported a 3-column CSV formated file (X,Y,Z) ["K" Type File] and discovered that the contour color is not working properly for the z-levels in the data.

If needed I can e-mail the large (~6MB) CSV file, but here is a short summary of X,Y,Z ranges:

X varies from 0 to 360 in 0.1 increment steps (this represents an INPUT ANGLE in degrees)

Y varies from 0 to 60 in 0.1 increment steps (this represents an INPUT MAGNITUDE - relative units)

Z has same units as X:
Z=0.0 for Y=0 to Y=7 (for all X) -- This has proper contour color
Z=72.0 for Y>7 to Y = 40 (for all X) -- This has NO (i.e. white) contour color
Z=-5.0 for Y>40 to Y = 60 (for all X) -- This has NO (i.e. white) contour color
Note that these are discrete transitions in this particular data. When I hoover the mouse over the uncolored areas of the plot that should be colored I can see that the data is indeed there.

Also, I made sure that min & max input values in Contour Options included the values seen in the data to no avail.

Ray Delaforce

I've tried several ways of fouling this up, but haven't been able to yet. With "shaded bands" I get the expected 3 horizontal bands from 0<=Y<=7, 7<Y<=40, and Y>40. With contour lines I get lines at (depending on what interval I use) Y=7 and Y=40.

The only thing I can think of that would cause this to foul up is the extents of the plot under Options>Extents/Intervals/Size. For example if I set the Z extents to -4 to 4, the plot is mostly white. But that's the correct behavior for those extents.

You're welcome to send me your file.

By the way (though this has nothing to do with whatever problem you've found), you can generate this surface with Z=f(X,Y) and

Z=72*(y>7)-77*(y>40)

(The inequalities are evaluated as true=1, false=0.)

Curiously, this:

Z=if(y>40,-5,if(y>7,72,0))

does not work and gives a syntax error about too many parameters. Apparently if() blocks cannot be nested, though I'm not sure why at the moment. Will definitely look into this.

I've sent a zipped file containing the .grf file and the .set configuration file I used.

Ray Delaforce

The problem is what I mentioned earlier. Under Options>Extents/Intervals/Size your Z extents are -2 to 30. So the Z=-5 and Z=72 points are clipped.

Duh! (I slap my own head)

Sorry I didn't read your earlier posting closely enough.
When you wrote, "Options>Extents/Intervals/Size your Z extents", my mind was still focused on Options>Contour Options.../Input values/upper and lower interval limits.

Thanks for your patience.

Ray Delaforce