MATLAB: Is there the more elegant way to do this

evalfunctionvarargin

I would like to call arguments of function from a string or cell array. For example, this code works as I want:

function testarg()
a=1;b=2;c=3;
m='a,b,c';
eval(['myfun(',m,')']);
function myfun(a,b,c)
a
b
c

Is there another way to do this? Say, without using eval ?

Best Answer

function myfun(varargin)
varargin{:}

Related Solutions

MATLAB: [] appears after a function

According to the function documentation, those square brackets contain any output arguments. Because the square brackets you show in your question contain zero variables, that function has zero output arguments.

function [A,B,C,D] = myfun(...) % 4 output arguments
function [A,B,C] = myfun(...)   % 3 output arguments
function [A,B] = myfun(...)     % 2 output arguments
function [A] = myfun(...)       % 1 output arguments
function [] = myfun(...)        % 0 output arguments

For one or zero output arguments the square brackets can be omiited entirely:

function A = myfun(...)        % 1 output arguments
function myfun(...)            % 0 output arguments

MATLAB: How to load many variables form base environment

"goal is not to write nice matlab code, but instead structure it in the most convenient way" &nbsp How come you believe there is conflict between "nice" and "convenient"? Whatever these words mean in this context.

Here is an "elegant" code that meets your original requirements. Example of use:

    a = 1;
    b = magic(3);
    c = dir;
    JustGetTheWorkDone a b c

prints

      Name           Size            Bytes  Class     Attributes
      a              1x1                 8  double              
      b              3x3                72  double              
      c             89x1             57407  struct              
      varargin       1x3               342  cell

where

    function    JustGetTheWorkDone( varargin )
        loadVarsFromBaseEnv( varargin{:} )
        whos
    end

and

    function    loadVarsFromBaseEnv( varargin )
        try
            for jj = 1 : length( varargin )
                val = evalin( 'base', varargin{jj} );  
                assignin( 'caller', varargin{jj}, val ) 
            end
        catch
            fprintf( 2, 'loadVarsFromBaseEnv: Something went wrong\n' ) %#ok<PRTCAL>
        end
    end

Best Answer

Related Solutions

MATLAB: [] appears after a function

MATLAB: How to load many variables form base environment

Related Question