x = MATRIX, any numerical type.
RETURN: VECTOR, DOUBLE, column-wise average.
Column-wise average value of matrix Returns a row vector with the column-wise average value of matrix input. Each element of the returned vector is the average value of the corresponding column. Output is of same type as input except for INTEGER input which is coerced to DOUBLE before processing. COMPLEX inputs return COMPLEX outputs.
[ 1 , 2 ]
[ 3 , 4 ]
[ 2 , 3 ]