FEATool Multiphysics  v1.16.4
Finite Element Analysis Toolbox
evalexpr0.m File Reference


EVALEXPR0 Evaluates an expression in a point on a group of cells.

[ VEVAL ] = EVALEXPR0( S_EXPR, XI, IND_S, IND_C, IND_E, PROB, AJAC ) Given a valid PROB struct evaluates the expression S_EXPR on cells with index IND_C at point XI in local coordinates.

Input       Value/[Size]           Description
s_expr      string                 String expression to evaluate
xi          [n_sdim(+1),1]         Local coordinates of evaluation point
ind_s       scalar                 Subdomain to evaluate coefficients
ind_c       [n_c]                  Index vector to cells to evaluate
ind_e       scalar/array [n_c]     Index vector to edges to evaluate
prob        struct                 Problem definition struct
                                   (uses prob.sol.u(:,end) for evaluations)
aJac        (n_c,:)                Optional array for Jac. inverse and determinant
gradrec     scalar                 Flag to use gradient recovery for derivatives
                                   for first order Lagrange elements (default 0)
Output      Value/(Size)           Description
vEval       [n_c]                  Output vector of evaluated values
See also
evaldvar, evalsfun