rowWsum

rowWsum(X, Y)

Please see rowFunctions for the parameters and calculation rules.

Calculate the cumulative weighted sum of X by row with Y as the weights and return a vector with the same number of rows of X.

m1=matrix(2 -1 4, 8 3 2, 9 0 1)
m2=matrix(8 11 10, 8 17 4, 14 6 4)
rowWsum(m1, m2)
// output
[206, 40, 52]

m3=matrix(8 NULL 10, 8 NULL 4, 14 NULL NULL)
rowWsum(m1, m3)
// output
[206, , 48]

a= -10 12.3 4 -8
b= 17.9 9 7.5 -4
c= 5.5 6.4 -7 8
x=array(DOUBLE[],0, 10).append!([a, b, c])
y=array(DOUBLE[],0, 10).append!([b, a, c])

rowWsum(x, y)
// output
[0.63, -6.3 , 184.21]

Related function: wsum