python颜色亮度_Matplotlibpcolormesh，分离数据颜色和颜色亮度信息

我建议你自己定制颜色图来解决这个问题from matplotlib.colors import LinearSegmentedColormap

data &＃61; np.array([[1, 0, 0, 1],

[0, 0, 1, 1],

[0, 0, 0, 1]])

colorInformation &＃61; np.array([[0.1, 0.12, 0.02, 0.01],

[0.12, 0.15, 0.18, 0.2],

[0.3, 0.34, 0.41, 0.32]])

alpha_up&＃61;abs(((data*2-1)*colorInformation).max())

alpha_low&＃61;abs(((data*2-1)*colorInformation).min())

mid&＃61;alpha_low/(alpha_up&＃43;alpha_low)

cdict1 &＃61; {&＃39;red&＃39;: ((0.0, 1.0, 1.0),

(mid, 1.0, 0.0),

(1.0, 0.0, 0.0)),

&＃39;green&＃39;: ((0.0, 0.0, 0.0),

(1.0, 0.0, 0.0)),

&＃39;blue&＃39;: ((0.0, 0.0, 0.0),

(mid, 0.0, 1.0),

(1.0, 1.0, 1.0)),

&＃39;alpha&＃39;: ((0.0, alpha_low, alpha_low),

(mid, 0.0, 0.0),

(1.0, alpha_up, alpha_up))

}

red_blue &＃61; LinearSegmentedColormap(&＃39;red_blue&＃39;, cdict1)

fig, ax &＃61; plt.subplots()

heatmap &＃61; ax.pcolormesh((data*2-1)*colorInformation, cmap&＃61;red_blue)

或者你可以只改变红色和蓝色而不用阿尔法通道。在