Write a function that takes matrix A, and squares each element in the matrix
A = [1 2 3]
output = [1 4 9]
frame of the matrix
Sum the numbers on the main diagonal
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BASICS - sum part of vector
Matlab Basics - Switching Assignments
Matlab Basics II - Find the roots of a function
Matlab Basics II - Count rows in a matrix
Matlab Basics - Assigning Variables
Matlab Basics II - Intervals
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