[R] Interactive plots?

[mister_bluesman]

Hi there. 

I have a matrix that provides place names and the distances between them:

           Chelt     Exeter	London	Birm
Chelt     0       118     96      50
Exeter   118    0       118     163
London  96     118     0       118
Birm      50     163     118     0

After performing multidimensional scaling I get the following points plotted
as follows

http://www.nabble.com/file/p10810700/demo.jpeg 

I would like to know how if I hover a point I can get a little box telling
me which place the point refers to. Does anyone know?

Many thanks.
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