## Matplotlib 3-D mesh wiregrid example

Matplotlib relies on proper import order. For 3D plotting to work in Matplotlib, you must have imports in this order BEFORE any other import that imports Matplotlib.

```
import matplotlib as mpl
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
```

- If your program has multiple entry points, put the above 3 lines of code in both files, so that it's executed before any other
`import matplotlib`

statements

Else, if you try importing Axes3D in a later function that actually does the 3D plotting, it may give a `RuntimeError`

.

## Example

Note: You can also use Mayavi for advanced 3-D plotting in Python

3-D mesh wiregrid: minimal working example for the current version of Matplotlib. You can pan, rotate, etc. in the figure window that opens.

```
from mpl_toolkits.mplot3d import Axes3D # this line must come before the next line!
from matplotlib.pyplot import figure,show
import numpy as np
def plot3():
x,y = np.meshgrid(np.linspace(0,2*np.pi), np.linspace(0,2*np.pi))
z = np.sin(x+0.5*y)
ax = figure().gca(projection='3d')
ax.plot_wireframe(x,y,z)
show()
if __name__ == '__main__':
plot3()
```