Clear Filters
Clear Filters

how to create a cell array with functions from a matrix consisting symbolic expression

2 views (last 30 days)
I have a matrix A
clear all
clc
syms x y
A= [x x^2+y^2;x-y 2+y];
and I want to get a cell array like B; how do i get.. B needs to be a cell array with all elements having both x and y in their function handle regardless of the fact that wheather it is afunction of one variable only.
B = {@(x,y)x,@(x,y)x.^2+y.^2;@(x,y)x-y,@(x,y)x.^2-y.^2}
Thanks for your time and kind help

Accepted Answer

Steven Lord
Steven Lord on 27 Apr 2023
Use arrayfun to call matlabFunction on each element of your symbolic array. In order for all the functions to have the same signature (the same input arguments) we need to precompute the list of variables used in expressions in A. The symvar function does that.
syms x y
A= [x x^2+y^2;x-y 2+y];
variablesInA = symvar(A)
variablesInA = 
c = arrayfun(@(z) matlabFunction(z, 'Vars', variablesInA), A, 'UniformOutput', false)
c = 2×2 cell array
{ @(x,y)x} {@(x,y)x.^2+y.^2} {@(x,y)x-y} { @(x,y)y+2.0}
To check, let's call some of the functions.
c{1, 2}(3, 4) % 3.^2+4.^2 is 25
ans = 25
c{2, 2}(Inf, 5) % 5 + 2 is 7, x is not used
ans = 7

More Answers (0)

Products


Release

R2022a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!