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我繪製球面座標運行一些流體動力學模擬數據,有時更喜歡pcolormesh使用contourf,因爲它看起來不錯,順利的,而不是像素化。但是,我注意到contourf總是將我的數據在極座標圖中擴展到r = 0,但我的數據從不包含r = 0。我使用下面的簡單示例重現了此問題:極座標圖使用contourf地塊不正確範圍
from pylab import *
fig = figure(figsize=(6, 6))
ax = fig.add_subplot(111,projection='polar')
# generate some data
Nt,Nr = 150,150
r_axis = np.linspace(0.5,1.,Nr)
t_axis = np.linspace(0.,0.5*np.pi,Nt)
r_grid, t_grid = np.meshgrid(r_axis,t_axis)
data = np.zeros((Nt,Nr))
sin_theta = np.sin(t_axis)
for i in range(Nr):
data[:,i] = sin_theta
if 1: # polar plot using contourf - plots incorrectly from r = 0
scale = np.linspace(0.,1.,100)
polar = ax.contourf(t_grid,r_grid,data,scale,cmap='Spectral')
else: # correctly plots the data
polar = ax.pcolormesh(t_grid,r_grid,data,cmap='Spectral')
show()
是否有快速修復?感謝