issue in 3D plotting in python using data from a text file

Question

I have been trying to import a text file and plot it in python using "wireframe", although I keep getting an error saying:

"ValueError: shape mismatch: objects cannot be broadcast to a single shape".

I would appreciate it if anyone could help me with this. my input text file format is like:

11 12 13 14

21 22 23 24

31 32 33 34

and the code is:

`import os
from mpl_toolkits.mplot3d import axes3d
import matplotlib.pyplot as plt
import numpy as np

data = np.genfromtxt('X1slackresultsforplot.txt', delimiter=' ')

x = [0.78,0.79,0.8]
y = [10,20,30,40]
Z = np.array(data)
X, Y = np.meshgrid(x, y)

fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.plot_wireframe(X,Y,Z,rstride=10,cstride=10)
plt.show()`

Thanks.

I think you need to transpose your data: data = data.T

taras
– taras

2017-06-24 18:27:33 +00:00
Commented Jun 24, 2017 at 18:27 — taras
– taras, Commented Jun 24, 2017 at 18:27

eeshugerman · Accepted Answer · 2017-06-24 18:31:10Z

1

X and Y have shape (4, 3), but Z has shape (3, 4). Perhaps you want the transpose of Z? The following runs without an error:

ax.plot_wireframe(X,Y,Z.T,rstride=10,cstride=10)

answered Jun 24, 2017 at 18:31

eeshugerman

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