Hello,
Maybe using ?Reduce:
Zlist <- c(mat1, mat2, mat3)
Z <- Reduce(cbind2, Zlist)
Ztmp <- cbind2(mat1, mat2)
Z2 <- cbind2(Ztmp, mat3)
identical(Z, Z2) # TRUE
Also, I prefer list(mat1, mat2, mat3), not c().
Hope this helps,
Rui Barradas
Em 12-11-2013 17:20, Doran, Harold escreveu:
Suppose I have three matrices, such as the following:
mat1 <- Matrix(rnorm(9), 3)
mat2 <- Matrix(rnorm(9), 3)
mat3 <- Matrix(rnorm(9), 3)
I now need to column bind these and I could do the following if there were only
two of those matrices because cbind2() has an x and y argument
Zlist <- c(mat1, mat2)
Z <- do.call(cbind2, Zlist)
The following would not work as noted in the help page for cbind2() and I don't
think I want to activate cbind() here.
Zlist <- c(mat1, mat2, mat3)
Z <- do.call(cbind2, Zlist)
So, the object I would want in the end would be
Ztmp <- cbind2(mat1, mat2)
Z <- cbind2(Ztmp, mat3)
I never have a large number of these things to combine, so I have solved the
problem with a simple loop over the list.
I'm curious though if there is a better (and perhaps) more reliable way to do
this?
Thanks,
Harold
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