Does anyone here have any experience converting GMT color palettes
into pylab colormaps? I took a stab at it, and the results are not
really what I expected.
GMT, for the unfamiliar, is a scientific plotting/mapping package
that I'm doing my best to rid myself of. If you've never heard of
it, then you can probably ignore this message.
Here's my attempt at bringing in a GMT color palette:
#!/usr/bin/python
from pylab import *
#GMT color palette - Colors are specified by a RGB triplet with each
value in the range
#0-255. The palette below specifies that a data value between 1 and
2 will be assigned a color
#linearly interpreted between the colors (255,255,255) and
(191,204,255).
# 0 255 255 255 1 255 255 255
# 1 255 255 255 2 191 204 255
# 2 191 204 255 3 160 230 255
# 3 160 230 255 4 128 255 255
# 4 128 255 255 5 122 255 147
# 5 122 255 147 6 255 255 0
# 6 255 255 0 7 255 200 0
# 7 255 200 0 8 255 145 0
# 8 255 145 0 9 255 0 0
# 9 255 0 0 10 200 0 0
# 10 200 0 0 13 128 0 0
cdict = {'red': ((0.0,1.00,1.0),
(0.1,1.00,0.75),
(0.2,0.75,0.63),
(0.3,0.63,0.50),
(0.4,0.50,0.48),
(0.5,0.48,1.00),
(0.6,1.00,1.00),
(0.7,1.00,1.00),
(0.8,1.00,1.00),
(0.9,1.00,0.78),
(1.0,0.78,0.50)),
'green': ((0.0,1.00,1.00),
(0.1,1.00,0.80),
(0.2,0.80,0.90),
(0.3,0.90,1.00),
(0.4,1.00,1.00),
(0.5,1.00,1.00),
(0.6,1.00,0.78),
(0.7,0.78,0.57),
(0.8,0.57,0.00),
(0.9,0.00,0.00),
(1.0,0.00,0.00)),
'blue': ((0.0,1.00,1.00),
(0.1,1.00,1.00),
(0.2,1.00,1.00),
(0.3,1.00,1.00),
(0.4,1.00,0.58),
(0.5,0.58,0.00),
(0.6,0.00,0.00),
(0.7,0.00,0.00),
(0.8,0.00,0.00),
(0.9,0.00,0.00),
(1.0,0.00,0.00))}
my_cmap = matplotlib.colors.LinearSegmentedColormap('my_colormap',cdict)
pcolor(rand(10,10),cmap=my_cmap)
colorbar()
savefig('colormap.png')
------------------------------------------------------
Michael Hearne
[EMAIL PROTECTED]
(303) 273-8620
USGS National Earthquake Information Center
1711 Illinois St. Golden CO 80401
Senior Software Engineer
Synergetics, Inc.
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