[R] Autofilling a large matrix in R
Rui Barradas
ruipbarradas at sapo.pt
Fri Oct 12 17:03:37 CEST 2012
Hello,
Something like this?
g[rowSums(g) == 100, ]
Hope this helps,
Rui Barradas
Em 12-10-2012 15:30, wwreith escreveu:
> I wish to create a matrix of all possible percentages with two decimal place
> percision. I then want each row to sum to 100%. I started with the code
> below with the intent to then subset the data based on the row sum. This
> works great for 2 or 3 columns, but if I try 4 or more columns the number of
> rows become to large. I would like to find a way to break it down into some
> kind of for loop, so that I can remove the rows that don't sum to 100%
> inside the for loop rather than outside it. My first thought was to take
> list from 1:10, 11:20, etc. but that does not get all of the points.
>
> g<-as.matrix(expand.grid(rep(list(1:100), times=3)))
>
> Any thoughts how to split this into pieces?
>
>
>
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