For given input matrix a, rotate it by 90 degrees and find the sum of the diagonals.
1 2 3 4
5 6 7 8
8 10 12 -2
-1 -3 -5 -7
Project Euler: Problem 6, Natural numbers, squares and sums.
Find the nearest integer
Sum of series III
Back to Basics - Find no. of elements in a matrix?
find number of times of occurrence of the most frequent number in a row vector
Percentage of zeros in a matrix of only 1s and 0s
count upper and lower case characters
Remove white spaces at the end of the input string
Find NaNs in the matrix
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