On 19 Feb 2016, at 14:36, Lawrence Mitchell <lawrence.mitchell@imperial.ac.uk> wrote:

On 19 Feb 2016, at 13:15, Angwenyi David <kipkoej@gmail.com> wrote:

Hi all,

I still have a problem with the time loop. I get the following error.

f = Function(V).interpolate(Expression("x[0]*x[1]*x[2]*t"))

This line is wrong.

The "t" variable is not defined by default in the Expression evaluation.

You need to write something like:

Expression("x[0]*x[1]*x[2]*t", t=the_value_you_want_t_to_have)

Cheers,

Lawrence
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