| XYZ plotting [message #44724] |
Mon, 11 July 2005 09:05 |
burkina
Messages: 32
Registered: February 2005
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Member |
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Well, this is probably a silly question, but I cannot find a
straightforward answer, so I think I'd better ask to someone who
understanfs IDL much better than me!
I have an ASCII file with a 3D function, like:
0.55 2.0 0.000198665
0.55 2.25 0.000215043
0.55 2.5 0.000228681
0.55 2.75 0.000241278
0.55 3.0 0.000253149
0.55 3.25 0.000266940
0.55 3.5 0.000287297
0.55 3.75 0.000321452
0.55 4.0 0.000387827
0.55 4.25 0.000547268
0.55 4.5 0.00110803
0.55 4.75 0.00685613
0.55 5.0 64.4346
0.55 5.25 1013.68
0.6 2.0 0.000353857
0.6 2.25 0.000383346
0.6 2.5 0.000407687
.......
Quite obviously, the first is the X value, the second is the Y value
and the third is the Z value.
I simply would like it to treat it with the contour and the surface
commands.
I've found a method in Dave Fanning's page, but I would prefer not to
use triangular grids. Instead I'd prefer to change the dataset in the
2-d array required by contour and 2 linear vectors for x and y.
I guess I wuold succed in doing this with some loops, but I hoped there
would be an easier way with IDL. I mean... is there a straightforward
way to plot your xyz data in IDL?
Alternatively (but I guess it's almost the same idea), I would like to
plot in the x-y plane the z values with a color code, like an image,
selecting the ranges for each color as I prefer, likely smoothing the
image.
Thanks for your help,
Stefano
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