Dear all,

I would like to get the animation on the linear wave equation in the tutorial as a visualisation in Paraview. I used the following code to store result files:

...     phi -= dt / 2 * p

...     t += dt

...     if step % 10 == 0:

...         File("waveEqn.pvd")<< phi

...         output = File("waveEqn.pvd")

...         output << phi

...         del output

I expected a number of files that would form snapshots for the animation, but I got a single file. Could you please show me how to go about it.

Regards.

David