Find the sum of all the odd numbers in a matrix.
x = [2 3 5 7 1 4 11]
y = 27
Getting logical indexes
Given a window, how many subsets of a vector sum positive
Swap two numbers
Alternately upper-lower case
most frequent character
index of n^2 in magic(n)
Find the index of n in magic(n)
union without repitition
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