How to centre a colorbar at a defined value for seaborn heatmap?

Question

I am trying to plot a heatmap using seaborn. I have values from 0 to 5 and I need to make a blue-to-red color scale, with white being at 1, blue- below 1, and red - from 1 to 5.

How can I do that?

import seaborn as sns; sns.set()
hm=sns.heatmap(proportion, vmin=0, vmax=5, cmap='RdBu')

This is what I try to do, but it is not customized... 'proportion' is my variable. Is there anything I can do?

Do you want to have 3 colors, or a gradient? – ImportanceOfBeingErnest Feb 02 '18 at 19:28 — ImportanceOfBeingErnest, Feb 02 '18 at 19:28
I will definitely need a gradient... – Tom Smith Feb 02 '18 at 19:29 — Tom Smith, Feb 02 '18 at 19:29

score 15 · Accepted Answer · answered Feb 02 '18 at 19:38

15

Maybe you mean to use the center argument,

import matplotlib.pyplot as plt
import seaborn as sns
import numpy as np

data = np.random.rand(10,10)*5

ax = sns.heatmap(data, vmin=0,vmax=5,center=1,cmap="RdBu_r")

plt.show()

answered Feb 02 '18 at 19:38

ImportanceOfBeingErnest

321,279
53
665
712

This is perfect! Thanks! – simpleParadox Jul 07 '21 at 07:00

How to centre a colorbar at a defined value for seaborn heatmap?

1 Answers1

Linked