How to set a variable for nested loops?

Question

I would like to write a function which accepts as input the number of nested loops which the function will perform. For example, if the input parameter is 3, the function will perform 3 nested loops as follows :

for i=0:[any]
 for j=0:[any]
  for k=0:[any]

and if the input parameter is 2, it would be like this :

for i=0:[any]
 for j=0:[any]

How can I implement this algorithm ?

Answer 1

As mentioned above, this problem can usually be solved by recursion.

Somehow like this:

function res = nestedloop_function(numLoops,remainingParams)
    res = rec_function(numLoops,[],remainingParams);
end

function res = rec_function(numLoops, loopVars, remainingParams)
    if numLoops == 0
        res = whatever(loopVars, remainingParams);
        return res;
    end

    for k = 1:[any]
        loopVars = [loopVars,k];
        res = rec_function(numLoops-1, loopVars, remainingParams);
    end
end

If you don't want to have the overhead of passing remainingParams and loopVars you can think about declaring them as global, but it is often better to avoid this...