Passing A Variable Number of Arguments into a Function

Question

In Matlab, I have a variable length cell of values:

C={A1,...,An}

How should I pass and distribute these values into a function able to receive a variable number of arguments?

f(A1,...,An)

Ultimately if not possible, how should I modify the beginning of this function for making this work?

Luis Mendo · Accepted Answer · 2017-12-10 04:12:58Z

2

You need to convert the cell array into a comma-separated list via curly-brace indexing, that is, use C{:}.

Example with the reshape function:

>> C = {ones(3,4), 2, 2, 3};
>> y = reshape(C{:});
>> size(y) % check
ans =
     2     2     3

answered Dec 10, 2017 at 4:12

Luis Mendo

113k13 gold badges80 silver badges154 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Brethlosze Over a year ago

I tried with (:).... i was about to write a whole change for so tricky detail!!!

user2305193 · Accepted Answer · 2017-12-10 09:42:19Z

1

This is exactly what 'varargin' does for you. Read in multiple variables, e.g. f(a,b,c), and store them in a cell-array.

Then you could go for one of these 'quick and dirty' processing methods:

function asdf(varargin)
  yourarguments=[varargin{:}]; % if all numerical
  yourargumentscontain=contains(varargin,'asdf'); %if strings contained
  all_processed_args=cellfun(@(x) whateveryouwant_function(x), varargin); %for older versions of matlab
end

For more here's documentation: https://ch.mathworks.com/help/matlab/matlab_prog/parse-function-inputs.html

answered Dec 10, 2017 at 9:42

user2305193

2,05920 silver badges45 bronze badges

2 Comments

Brethlosze Over a year ago

This is the converse, for reading from a function, not for inputting into a function.

user2305193 Over a year ago

sorry, the answer assumes you're working with varargin. I guess this is not the case then.

Collectives™ on Stack Overflow

Passing A Variable Number of Arguments into a Function

2 Answers 2

1 Comment

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related