[S] triangular matrix

[Winson Taam <taam@Oakland.edu>]

I wonder if there is a function to take a row of values into
an upper or lower triangular matrix.

Input:
 c( 1, 2, 3, 4, 5, 6)

Output: 
matrix
 ( 0 1 2 3
   0 0 4 5
   0 0 0 6
   0 0 0 0 )

I have pairwise distances that I would like to perform a Multidimensional
Scaling operation on. Have anyone work on a similar problem? 

Winson Taam
Department of Math. & Stat.
Oakland University
Rochester, MI 48309

tel: 248-370-3438

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