[英]Adding markers or lines to colorbar in matplotlib
I have the following lines of code to generate a heatmap ( pcolormesh
). 我有以下几行代码来生成热图( pcolormesh
)。
import matplotlib.pyplot as plt
import numpy as np
vals = np.linspace(-np.pi/2, np.pi/2, 101)
x, y = np.meshgrid(vals, vals)
z = np.abs(np.sinc(x) * np.sinc(y))
xDeg = np.rad2deg(x)
yDeg = np.rad2deg(y)
plt.pcolormesh(xDeg, yDeg, z, cmap = 'jet', vmin = 0, vmax = 1)
plt.colorbar()
plt.axis([-90, 90, -90, 90])
ticks = np.linspace(-90, 90, 13)
plt.xticks(ticks)
plt.yticks(ticks)
print np.mean(z) # 0.186225110029
print np.sqrt(np.mean(z**2)) # 0.295710882276
plt.show()
It produces this image: 它产生这个图像:
I'd like to place: 我想放置:
Any input? 有什么输入?
That was easier than expected. 这比预期的要容易。 I didn't realize colorbar has a plottable axis in plt.colorbar().ax
我没有意识到colorbar在plt.colorbar().ax
有一个可绘制的轴
cb = plt.colorbar()
cb.ax.plot(0.5, mean, 'w.') # my data is between 0 and 1
cb.ax.plot([0, 1], [rms]*2, 'w') # my data is between 0 and 1
# Note: would need to scale mean/rms to be between 0 and 1
Looks like the x-axis is (0, 1) and y-axis
(dataMin, dataMax)
(0, 1). 看起来像x轴是(0,1)和y轴
(dataMin,dataMax)
(0,1)。
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