FEATool Multiphysics
v1.17.0
Finite Element Analysis Toolbox
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EVALEXPR Evaluates an expression in specified points.
[ VEVAL ] = EVALEXPR( S_EXPR, XP, PROB, SOLNUM, EVAL_TYPE, TOL ) Evaluates the expression S_EXPR in the points specified in XP (in global x/y/z-coordinates). PROB is a valid finite element problem struct. The EVAL_TYPE flag (default 1) toggles vectorized evaluation for dof variables with P0-P2 fem shape functions, or allows faster evalution via intermediate nodal linear interpolation. TOL is a tolerance used by ismembertol/deduplicate to determined which if any evaluation points in XP are aligned with grid points.
Input Value/[Size] Description ----------------------------------------------------------------------------------- s_expr string String expression to evaluate xp [n_sdim,n_xp] Coordinates of evaluation points prob struct Problem definition struct solnum scalar {n_sols} Solution number/time to evaluate eval_type scalar {1} Evaluation type 0 - Standard/full evaluation 1 - Vectorized evaluation for dep. variables 2 - Linear interpolation via nodes (fast) 3 - Like 2 and allow invalid (nan) values tol scalar {1e-5} Tolerance for evalation/grid points . Output Value/(Size) Description ----------------------------------------------------------------------------------- vEval [n_xp,1] Output vector of evaluated values