search for: yfac

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2008 Feb 15
2
Softmax in nnet
...alues) and explicitly put softmax=T to compare the result of the default nnet with no softmax specification. I assume this should give me the same result. I got the result the default one, but not the softmax version and I got the error message that I did not quite understand. test6.nn.skipT.softm.Yfac <- nnet(Yfac~ X1 +.. +X8, skip=T, size=0, softmax=T, data = train.set) Error in nnet.default(x, y, w, entropy = TRUE, ...) : no weights to fit In addition: Warning messages: 1: In if (softmax) { : the condition has length > 1 and only the first element will be used 2: In if (skip) net <...
2001 Nov 21
2
distances from points to line
Dear all, I have discovered that there are many things that I used to do in my GIS which are easily done directly in R, for example calculating interpoint distances using geoR and pick out points inside a polygon using splancs. I now wonder, is there a function to create a line object like a watercourse and then calculate the distances between many points in space and this line? I couldn't