expression_test

expression_test, a FENICS code which investigates some simple uses of the Expression() function and Expression objects.

The Expression() function is a convenient way to take a formula, as a quoted string, and turn it into an object that can be evaluated, plotted, projected into a finite element space, or used to define a "form".

Note that I have installed FENICS using Docker, and so to run this script I issue the commands:

1. cd $HOME/fenicsproject/expression_test
2. fenicsproject run
3. python3 expression_test.py
4. exit

Licensing:

The GNU LGPL license.

Related Data and Programs:

mesh_test, a FENICS script which explores mesh objects.

Source Code:

• expression_test.py the script.
• expression_test.txt the output file.
• expression_test1.png a plot of an expression.
• expression_test3.png a plot of a "UserExpression".