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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