invert colormap in mlab

Question

I simply want to know how to invert a colormap in mlab. I know in matplotlib you can simply add _r to the name of the colormap to invert the color scheme. However it appears to be slightly different in mlab. Does anyone know how this can be achieved?

Can you be a little more specific. For example could you write this out in simple line of code. — user1750948, Feb 11 '13 at 21:09
http://docs.enthought.com/chaco/api/mappers.html#chaco.api.ColorMapper.reverse_colormap I don't use `mlab`, but I suspect that the function at that link will do the trick. — tacaswell, Feb 11 '13 at 21:15
I would also be careful about invert vs reverse terminology. Invert could also mean `(r, g, b) -> float`. — tacaswell, Feb 11 '13 at 21:17

score 12 · Answer 1 · answered Oct 29 '13 at 20:03

12

Using the script recording of the mayavi pipeline, I found :

s.module_manager.scalar_lut_manager.reverse_lut = True

answered Oct 29 '13 at 20:03

recursix

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score 3 · Accepted Answer · answered Jul 02 '13 at 18:38

I guess you want to reverse a colormap. Here is what works for me (it might not be the easiest solution, i am not an expert on mayavi), modified from here

s=mlab.surf(xx,yy,zz,colormap='GnBu')
lut = s.module_manager.scalar_lut_manager.lut.table.to_array()
ilut = lut[::-1]
# putting LUT back in the surface object
s.module_manager.scalar_lut_manager.lut.table = ilut
# forcing to update the figure once we have changed the LUT
mlab.draw()
mlab.view()

invert colormap in mlab

2 Answers2