Dear R Gurus,
As you probably know, dist calculates the distance between every two rows of
data. What I am interested in is the actual two rows that have the least
distance between them, rather than the numerical value of the distance
itself.
For example, If the minimum distance in the following sample run is d[14],
which is .3826119, and the rows are 4 & 6. I need to find a generic way to
retrieve these rows, for a generic matrix of NRows (in this example NRows=7)
NCols=5
NRows=7
myMat<-matrix(runif(NCols*NRows), ncol=NCols)
d<-dist(myMat)
1 2 3 4 5 6
2 0.7202138
3 0.7866527 0.9052319
4 0.6105235 1.0754259 0.8897555
5 0.5032729 1.0789359 0.9756421 0.4167131
6 0.6007685 0.6949224 0.3826119 0.7590029 0.7994574
7 0.9751200 1.2218754 1.0547197 0.5681905 0.7795579 0.8291303
e<-sort.list(d)
e<-e[1:5] ##Retrieve minimum 5 distances
[1] 14 16 4 18 5
--
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