How to automatically input function arguments?

I have to ask the user for the values of 'n'. I have two defined variables 'a' and 'b' which are vectors. I have to substitute 'a' and 'b' in the function allcomb() in a manner that 'a' occurs 'n' times followed by 'b'.

For example if n=5 then I need the value of allcomb(a, a, a, a, a, b).

For n=2, allcomb(a, a, b) is required.

How should I write a code which decides the input arguments?

Thank you.

Answer 1

[DGM]

Assuming that allcomb() takes a variable-length argument list, this is one way.

% inputs
n = 2;
a = [1 2];
b = [3 4];

% create expanded argument list
args = [repmat({a},[1 n]),{b}];

% use it
x = allcomb(args{:});

See also: https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

[Sheet Topno]

Thank you 🙏