我想生成一个带有两种颜色的3D图形。一种颜色用于值大于零,另一种颜色用于值小于零。但我无法找到如何在代码中实现这个功能。
这是我的当前代码:
from mpl_toolkits.mplot3d import Axes3D
from matplotlib import cm
import matplotlib.pyplot as plt
import matplotlib.tri as mtri
import pandas as pd
import numpy as np
df = pd.DataFrame.from_csv('...temp\\3ddata.csv', sep = ',', index_col = False)
fig = plt.figure()
ax = fig.gca(projection='3d')
x = df['P']
y = df['T']
z = df['S']
ax.plot(x, y, zs= 0, zdir = 'z', c= 'r')
ax.scatter(x,y, z, c = 'b', s = 20)
ax.set_xlabel('Pressure (Bar)')
ax.set_zlabel('Residual subcooling (J*Kg-1*K-1')
ax.set_ylabel('Temperaure of LNG (K)')
plt.show()
我读了几个例子,但无法将它们应用到我的数据上。是否可以通过for循环来实现这个目标?
或者类似于以下内容:
use_c = {<=0: "red", >=0 "blue"}
#ax.plot(x, y, zs= 0, zdir = 'z', c= 'r')
ax.scatter(x,y, z, c = [use_c[x[0]] for x in z], s = 20)
将z的值与颜色相关联的某些内容。