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evalexpr.m 2.08 KB
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function [ varargout ] = evalexpr( varargin )
%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
% Copyright 2013-2021 Precise Simulation, Ltd.
if( ~nargin && ~nargout ), help evalexpr, return, end
varargout = cell( 1, nargout );
[varargout{:}] = featool( 'feval', 'evalexpr', varargin{:} );
if( ~nargout ), clear varargout; end
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