Write a function that takes matrix A, and squares each element in the matrix
A = [1 2 3]
output = [1 4 9]
Swap the first and last columns
Replace NaNs with the number that appears to its left in the row.
Back to basics 21 - Matrix replicating
02 - Vector Variables 3
Matlab Basics II - Find the roots of a function
Matlab Basics - y as a function of x
Matlab Basics - Pick out parts of a vector
Matlab Basics II - Count rows in a matrix
Matlab Basics II - Create a vector with a repeated entry
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