This looks like a homework problem. If you have any questions ask your instructor or read the link below to get started:
Obviously we can't give you the full solution because you're not allowed to turn in our code as your own.
Hint:
output = nan(r, c);
numX = round(0.55 * r * c); % Number of elements to place an X into.
numY = round(0.02 * r * c); % Number of elements to place a Y into.
Two ways to do it:
- You can do it vectorized using randperm (assign the X to the first numX elements, then assign Y to the next numY elements, then use randperm to scramble the order), or
- you can do it brute force using a for loop to place the x value and another loop to place the Y value, but only in the location if the value is a nan (not an X).
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