[R] Nearest neighbour in a matrix

[Spartina]

Hello all,

I am brand new to R and doing an exercise for a class. I need to find the
nearest neighbour for points in the following matrix: 

> DistanceMatrix
           x1       x2       x3       x4       x5
[1,] 0.000000 2.828427 1.581139 2.236068 2.000000
[2,] 2.828427 0.000000 1.581139 4.123106 2.000000
[3,] 1.581139 1.581139 0.000000 2.549510 2.121320
[4,] 2.236068 4.123106 2.549510 0.000000 4.123106
[5,] 2.000000 2.000000 2.121320 4.123106 0.000000

I am not sure how to go about this as my knowledge of R functions and syntax
is very basic. 

Is there a way of going at it using the pmin function? Otherwise what would
be a simple way of going about it? 

Sorry for posting such a basic question! I've looked at the help pages and
other forums on the web but am truly stuck here.

Thanks in advance for your help...

Léa


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