I have output from a program which produces a distance matrix I want to
read into a clustering program in R.



The output is a .txt file and is 'almost' lower triangular in the sense
that it is just the triangle below the diagonal.



So for example a 4-by-4 distance matrix appears as,



1

2 3

4 5 6



i.e. it looks like a lower triangular of a 3-by3.



I thought I might be able to use "diag" to add zeros but apparently not.



It's a problem because my matrix is actually 1989-by-1989 not 4-by-4



I would not be at all surprised if the solution is obvious but I cannot
quite see how to read this into R.



Michael Anyadike-Danes

Economic Research Institute of Northern Ireland






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