How to reset a FOR loop if condition is met?

Hello,

I am running a for loop that generates two random values that correspond to the randomly generated indices of a matrix. I want to check the matrix at those coordinates to see whether or not the cell is empty. If it isn't empty, I want to regenerate a pair of random coordinates. I'm not sure the best or most efficient way of doing this. I have something that looks like this:

    randX = randi([1,size(emptyGrid,2)]); % random coordinates
    randY = randi([1,size(emptyGrid,1)]);
    if emptyGrid(randX,randY) ~= 0; 
         ???
    end % check cell

Any help or insight would be appreciated!

Thank you,

Geoff

Answer 1

[per isakson]

• "most efficient way" . See Premature optimization
• Why not show us a solution with a for-loop that does what you want.
• "to regenerate a pair of random coordinates" . Those new pairs what shall they be used for?