Hello,
I am trying to create a color map that maps 18 colors across 50 levels. As an
example let say I have three colors [r,g,b] and want everything between 1 an 2
to be r, 3 through 10 to be g, and 11 through 50 to be b. From what I can tell
it does not seem to be possible. Currently this is
Steve,
Could you please attach an example image of what you are seeing?
Ben Root
On Wed, Jul 14, 2010 at 5:52 PM, Steve McFarlin st...@stevemcfarlin.comwrote:
Hello,
I am trying to create a color map that maps 18 colors across 50 levels. As
an example let say I have three colors [r,g,b]
Ben -
You can see the image at http://www.surfguru.com/smc/TestRender.png . With a
continuous level array [1 .. 18] the image looks like
http://www.surfguru.com/smc/TestRender2.png
Thanks,
Steve
On Jul 14, 2010, at 4:12 PM, Benjamin Root wrote:
Steve,
Could you please attach an
Steve,
The ghost lines appear to be an artifact of the anti-aliasing. In my tests,
setting antialiased=False eliminates those lines.
The colormap looks fine to me. If you doubt it, try turning on the colorbar
to see if the values are correctly associated with the proper colors.
Ben Root
On
Ben -
I got ahead of myself my cropping the image. The color mapping is correct. It
is just different then what I expected. I thought it would partition the height
field data based on the levels array and index into the color array. Turning
off antialiasing did not solve the 'ghost lines'. I
Steve,
Which backend are you using? For TkAgg, this works:
m.contourf(x, y, z, levels=levels, cmap=cmap, antialiased=False)
Ben Root
On Wed, Jul 14, 2010 at 8:00 PM, Steve McFarlin st...@stevemcfarlin.comwrote:
Ben -
I got ahead of myself my cropping the image. The color mapping is
On 07/14/2010 12:52 PM, Steve McFarlin wrote:
Hello,
I am trying to create a color map that maps 18 colors across 50 levels. As an
example let say I have three colors [r,g,b] and want everything between 1 an 2
to be r, 3 through 10 to be g, and 11 through 50 to be b. From what I can tell
it
Ben -
The problem is occurring on os-x. I am a version behind on the libraries on
this machine. With the latest libraries (installed a few days ago on debian)
this problem does not occur with the agg backend. I think it is time to sit
down and learn the library rather then hack at it. Thanks
Eric -
Thank you very much. This is exactly what I was looking to do. I should have
realized the levels are boundaries, and my color array was not matched to the
number of regions. The need for BoundaryNorm makes total sense. Time to stop
blindly hacking. Thanks for your example script.
-
