
How to do this in an elegant way formatrix/data frame/zoo?

mat=
1 2 3
4 5 6
7 8 9

vector=
1
2
3


result=
0 1 2
2 3 4
4 5 6

ie
1-1  2-1  3-1
4-2  5-2  6-2
7-3  8-3  9-3

Thanks in advance.

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