given the following:
. mat i = (1, 2, 3)
. mat lis i
i[1,3]
c1 c2 c3
r1 1 2 3
.
. mat N = i' * i
. mat lis N
symmetric N[3,3]
c1 c2 c3
c1 1
c2 2 4
c3 3 6 9
... hot to create matrix in which instead of products I would have differences:
c1 | c2 | c3 | |
c1 | 0 | ||
c2 | 1 | 0 | |
c3 | 2 | 1 | 0 |
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