Find the average of odd values in given a matrix.
x=[ 4 11 8 ; 9 2 7 ]
y =( 11 + 9+ 7 ) / 3
Using explicit iteration is not the most efficient way of solving this problem, but if you do choose to iterate I would suggest using "linear indexing", per https://au.mathworks.com/help/matlab/math/matrix-indexing.html?s_tid=doc_srchtitle#f1-85511
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Average of even-numbered columns
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