Thank you very much!
Regards,
Lara
Shane Baylis escreveu no dia terça, 26/02/2019
à(s) 01:53:
> Hi Lara,
>
> You want to subset out 20% of the columns from a matrix, at random. Try:
>
> combinations <- combn(20,3) ## makes the 'all combinations' matrix
> sample <- combinations[,sample(1:ncol
Hi Lara,
You want to subset out 20% of the columns from a matrix, at random. Try:
combinations <- combn(20,3) ## makes the 'all combinations' matrix
sample <- combinations[,sample(1:ncol(combinations),
floor(ncol(combinations)*0.2))] ## subsets out 20% of the columns from that
object.
## Note th
Hello,
I want to select sets of combinations, but I do not want use all 1140
combn (20,3)
choose (20,3) - total of 1140.
[,1091] [,1092] [,1093] [,1094] [,1095] [,1096] [,1097] [,1098] [,1099]
[,1100]
[1,] 13 13 13 13 13 13 13 13
13 13
[2,]