How to reset a FOR loop if condition is met?

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Geoffrey
Geoffrey 2014-4-17
回答： per isakson 2014-4-17
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

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回答（1 个）

per isakson
per isakson 2014-4-17
  • "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?

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