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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