The problem statement is misleading. 'if x' and 'if isequal(x, true)' are different conditions.
Replace NaNs with the number that appears to its left in the row.
How long is the longest prime diagonal?
Vectorize the digits of an Integer
Find nearest prime number less than input number
Create a random vector of integers with given sum
Order of things - 4
Insert structure in a parameter-cell array.
Insert certain elements into a vector.
Only once: cleaning up your columns
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