Generalise calling of Matlab function with generic number of inputs

Question

Suppose I have a pre-built Matlab function

function A=f(varagin)
...
end

I call f.m in a file main.m.

When calling f.m, the inputs to include depend on the number of columns of two matrices X and Y.

For example, if

d=2;
X=randn(4,d);
Y=randn(4,d);

then

A=f(X(:,1),X(:,2),Y(:,1),Y(:,2));

If

d=3;
X=randn(4,d);
Y=randn(4,d);

then

A=f(X(:,1),X(:,2),X(:,3),Y(:,1),Y(:,2),Y(:,3));

If

d=4;
X=randn(4,d);
Y=randn(4,d);

then

A=f(X(:,1),X(:,2),X(:,3),X(:,4),Y(:,1),Y(:,2),Y(:,3),Y(:,4));

Could you help me to generalise the calling of f.m in main.m with any d?

Cris Luengo · Accepted Answer · 2019-08-12 16:11:45Z

4

The answer is more or less identical to that of your previous question about indexing:

args = {arg1, arg2, arg3};
f(args{:});

args{:} generates a comma-separated list of its elements, which is thus equivalent to using each of its elements as an argument to the function.

To convert the columns of a numeric matrix to a cell array, use mat2cell.

answered Aug 12, 2019 at 16:05

Cris Luengo

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