How to enable plot?

Question

I am learning FEniCS. I have a problem, when I run the example ft01_poisson.py.
Although there is plot(u) and plot(mesh) in the code, it doesn't give the plot figure when I run it. In the tutorial book FEniCS tutorial vol1, page18, it also says

If plotting is enabled in your FEniCS installation, then a window with a simple plot of the solution will appear as in Figure 2.1.

It seems that the plotting is not enabled in my FEniCS. If so, how can I enable it.
PS: I installed FEniCS through conda.

Answer 1

Do you call it in a python shell? Then you probably have to add

import matplotlib.pyplot as plt
plt.show()

somewhere (after the fenics plot commands)...

Comments

This doesn't work for me. When I type

plt.show()

nothing happens.

I try to go to http://127.0.0.1:3001, but get the message (from Chrome):

The 127.0.0.1 page isn’t working

127.0.0.1 didn’t send any data.
ERR_EMPTY_RESPONSE

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Now I uninstall Anaconda, and install FEniCS through the command given in FEniCS on Ubuntu , then the example ft01_poisson.py can plot. So it seems like the conda-package given in conda-release is unable to use the plot function.

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OK. Sorry to hear that. Same thing, when you run the example below???

import dolfin
import matplotlib.pyplot as plt

N = 5
sqmesh = dolfin.UnitSquareMesh(N, N+1)
plt.plot(1)
plt.show()
dolfin.plot(sqmesh)
plt.show()

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Thank you for your response. I just tried those exact lines and I still get the same result:

ERR_EMPTY_RESPONSE