Let say, I have a matrix with 8 rows and 6 columns:
> df1 <- matrix(NA, 8, 4)
> df1
[,1] [,2] [,3] [,4]
[1,] NA NA NA NA
[2,] NA NA NA NA
[3,] NA NA NA NA
[4,] NA NA NA NA
[5,] NA NA NA NA
[6,] NA NA NA NA
[7,] NA NA NA NA
[8,] NA NA NA NA
Now I want to get **all possible** ways to fetch 6 cells at a time. Is there
any function to do that?
Thanks,
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