[英]Matplotlib: fill_between two curves using discrete points
我正在嘗試重新創建以下圖像:
到目前為止,我已經編寫了以下代碼:
import numpy as np
import matplotlib
import matplotlib.pyplot as plt
import seaborn as sns
%matplotlib inline
yLow,yHigh = (-75,200)
xLow,xHigh = (-5.5,2.5)
plt.figure(figsize=(15,10))
ax = plt.gca()
x = np.linspace(xLow,xHigh,1000)
y = x**4
yG = -20*x +20
plt.plot(x,y,linewidth=1,linestyle='--',color='black');
plt.plot(x,yG,linewidth=3,);
plt.xlim(xLow,xHigh);
plt.ylim(yLow,yHigh);
# plt.xticks([], []);
# plt.yticks([], []);
plt.fill_between(x,yG,yHigh,alpha=0.3,color='green');
plt.fill_between(x,yG,yLow,alpha=0.3,color='green');
plt.fill_between(x,y,yG,color='red');
產生:
現在,我想繪制單個點的網格,並像原始圖像一樣將它們着色為綠色或紅色。 我本質上想用離散點而不是完整的陰影填充。 這可能嗎?
供以后參考,我能夠通過散點圖和網格網格實現以下目的:
X,Y = np.meshgrid(x,np.linspace(yLow,yHigh,numPoints));
Z = ( (Y<X**4) & (Y>-20*X +20) ) | ( (Y>X**4) & (Y<-20*X +20) );
plt.scatter(X,Y,c=Z,cmap=ListedColormap(['green','red']),alpha=0.5);
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