Apply Function Handle to Multiple Input Arguments

Question

I have a matrix and a vector in MATLAB defined:

A=rand(3);
x=rand(3,1);

And a function that takes these types of input arguments:

b = MacVecProd(A,x);

However, I'd like to use this function's function handle in order to apply it to my values. I thought that I could use cellfun for this, but:

v = {A,x};
cellfun(@MatVecProd_a, v{:})

Gives the error:

Error using cellfun
Input #2 expected to be a cell array, was double instead.

How do I do this correctly?

Answer 1

You could define your own, special function to call anonymous functions with given parameters, e.g.:

% define special function to call function handles
myfuncall = @(fh, v) fh(v{:});

% execute MacVecProd using myfuncall
b = myfuncall(@MacVecProd, v)

Based on your comment that you have array of functions and you want to execute them for your input arguments, you could do as follows:

  % cell array of function handles
  myFunctioins = {@MacVecProd, @MacVecProd2, @MacVecProd3};

  % execute each function with v parameters
  % I assume you want to execute them for the same input v
  resultCell = cellfun(@(fh) fh(v{:}), myFunctioins, 'UniformOutput', 0);