I have a dissimilarity dataset with the form:

1  1  dissimilarity value
1  2  ...
1  3
1  4
2  2
2  3
2  4
...

I would like to do nonmetric multidimensional scaling with this data, but I
am having trouble using this format.  I would like to either find a function
that accepts this format or find a way to easily convert this format to a
matrix for use with existing functions.

Thanks!

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