[R] Kohonen Package

[Peter Ehlers]

I haven't used pkg:kohonen, so this is just guessing:

1. are you using an old version of the package?

2. don't call the output of function som() 'som'. As
people around here might say: would you call your
iguana 'iguana'?

3. have you used str() on your object to check what
it really contains? I would guess that it should be
of class som and have a component 'distances'.

If none of that helps then it's beyond me.

  -Peter Ehlers


Brock Tibert wrote:
> Hi All,
> 
> I am still learning R, but making, IMO, great strides.  I learned about Kohonen/Self-Organizing Maps in class and I would like to try to replicate some of the things we have seen in class.
> 
> Below is my code.  I am trying to create a u-matrix.  In the documentation on page 9 it appears the type of plot, dist.neighbours should do the trick, however, I am getting an error:
> (Error in match.arg(type) : 'arg' should be one of "codes", "changes", "counts", "mapping", "property", "quality")
> 
> Since I am new to R, I figure I am missing something obvious.  Any help you can provide will be greatly appreciated!
> 
> Thanks in advance,
> 
> Brock
> 
> library(kohonen)
> 
> data("wines")
> wines.sc <- scale(wines)
> 
> som <- som(wines.sc, grid=somgrid(5, 5, "hexagonal"))
> plot(som)
> plot(som, type="dist.neighbours" )
> 
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