Thanks for respose.
you still used two steps to get the new matrix tst2:
step 1: tst2 = tst
step 2: perform the row operation in tst2.
Can you do this in a single step?
A similar example:
> tst
[,1] [,2] [,3] [,4]
[1,] 1 5 9 13
[2,] 2 6 10 14
[3,] 3 7 11 15
[4,] 4 8 12 16
# I define a new matrix by deleting the first row and the first column of
matrix tst using following single step:
> New.tst=tst[-1,-1]
> New.tst
[,1] [,2] [,3]
[1,] 6 10 14
[2,] 7 11 15
[3,] 8 12 16
# the original matrix tst is still .
> tst
[,1] [,2] [,3] [,4]
[1,] 1 5 9 13
[2,] 2 6 10 14
[3,] 3 7 11 15
[4,] 4 8 12 16
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