change the python matplotlib colormap dynamic range for certain range

Question

I have created a 2D gaussian function for display, the variable gauss (below) is in range of (0, 1). what I want to do is change the default colormap dynamic range from (black, white) to (gray, white)

gauss = np.exp( -(((Xm**2)+(Ym**2)) / (2.0* s**2)) )
p=plt.imshow(gauss, 'Greys_r')

Saullo G. P. Castro · Accepted Answer · 2014-09-12 06:23:41Z

2

You can use the color maps Greys_r in conjunction with the parameters vmin=0.25 and vmax=1..

from matplotlib import cm

p = plt.imshow(gauss, cmap=cm.Greys_r, vmin=025, vmax=1.)

edited Sep 12, 2014 at 6:23

answered Sep 11, 2014 at 21:05

Saullo G. P. Castro

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2 Comments

cong liu Over a year ago

3Q, but I want to shrink the range rather than invert it.

cong liu Over a year ago

^_^, have checked. I'm new to stack.

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