Fitting N(N-1) points on an NxN matrix

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Vic
Vic 2012-12-1
Suppose I have an N(N-1) vector that corresponds to each non-diagonal entry of an NxN matrix. Is there anyway that I can encode that onto my matrix?
i.e. For n=3, given [ 2 3 4 5 6 7 ] we obtain
[0 4 6 ; 2 0 7 ; 3 5 0]?
  2 个评论
Nasser M. Abbasi
Nasser M. Abbasi 2012-12-1
编辑：Nasser M. Abbasi 2012-12-1
If one posts same question here and at another forum at the same time, like comp.soft-sys.matlab, it is only right that you mention that and give a link. This way one does not waste their time if someone else already answered you on the other forum.
Vic
Vic 2012-12-1
I didn't know how that happened... but thanks for letting me know

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采纳的回答

Matt Fig
Matt Fig 2012-12-1
编辑：Matt Fig 2012-12-1
% Say your given vector is:
X = [ 2 3 4 5 6 7 ];
% Now to make the matrix.
L = (1 + sqrt(1+4*length(X)))/2;
F = double(~eye(L));
F(~eye(L)) = X

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Vic
Vic 2012-12-1
thanks!

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