x is a vector of undetermined length
You are to replace every 3rd element with the number 4, example:
x = [11 23 34 43 2 31 6 34 5 45 26 7 78];
output = [11 23 4 43 2 4 6 34 4 45 26 4 78];
Make sure the code accounts for varying vector lengths
In view of the recent spate of trivial problems with no test suite to speak of, thanks for making the effort of providing a proper test suite and a slightly less trivial problem.
Replace NaNs with the number that appears to its left in the row.
Project Euler: Problem 7, Nth prime
Cell Counting: How Many Draws?
Matlab Basics II - Determine if an array has a 3rd dimension
Matlab Basics - y as a function of x
Matlab Basics II - Extract last 3 elements of a vector
Matlab Basics II - squares
Matlab Basics II - Max & Index of Max
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