The operator
... Cell_interpolation(const Variable& vec);
interpolates a piecewise linear function to a piecewise constant function. Here is an example:
... Variable u(grid); Cell_variable w(grid); ... w = Cell_interpolation(u) * 2.0;
To transform a piecewise constant function to a linear function,
one can apply a local stiffness matrix with
variable coefficient.
Last modified: Fri Jul 13 15:47:34 PDT 2001