Hi
you need the tensor library:
> library(tensor)
> z <- array(runif(27),rep(3,3))
> w <- runif(3)
> w[1]* z[,,1] + w[2]*z[,,2] + w[3]*z[,,3]
[,1] [,2] [,3]
[1,] 1.2700333 1.1920113 0.8015904
[2,] 0.5175217 0.7808569 0.6306053
[3,] 0.8386015 0.6143882 0.6382314
> tens
Hello,
I would like to compute a weighted combination of matrices.
I have a number of matrices, arranged in a 3D-array, say:
z = array(rep(1:3,c(9,9,9)),c(3,3,3))
so that z[,,1] is my first matrix, and z[,,2] and z[,,3] the second and
third one, and a vector of coefficients:
w = rep(1/3,3)
I
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