How to use frames in Viper

Question

Hello,

At each time step of a time loop I have a function u that is
updated and plotted with "plot(u)". But each time the method
plot is called a new frame is opened. How can I have everything
plotted in the same frame ?

Thanks.

Answer 1

You are probably plotting a Function that needs to be projected each time plot is called and as such a new object is created leading to a new frame. With this trick here you are always plotting the same object and thus the frame should remain the same:

V = FunctionSpace(mesh, 'CG', 1)
uplot = Function(V)
for i in range(10):
    uplot.assign(project(u, V))
    plot(uplot)

Comments

Yes I am working with functions in a DG FunctionSpace.
It is working nice with your "trick".

But another problem appeared when trying to plot four different functions
at each time step. At the first time step the four frames were distributed in
such a way that I could see them at a glance. Starting with the second
time step the four frames were overlapped.

Thanks a lot!

Answer 2

Viper is no longer supported or developed.

With recent DOLFIN version (>= 1.2), try

# u is some Function
plotter = VTKPlotter(u)
for i in range(10);
    # Some computation that change u
    plotter.plot()

Comments

I am still working with dolfin 1.0.0.
I would prefer to wait a bit before making an update.
Is there another way ?

Thanks!