On 02.03.2010 17:05, Häring, Tim (LWF) wrote:
I`m using SVMs for multi-class classification problems. Therefore I`m
using the svm() function in the package "e1071".
If I use svm(...type="C-classification") everything works fine. But
if I want to use nu-SVM with svm(..., type="nu-classification", nu=0.5)
R crashes immediately. No error message - just crash.
Did anybody had the same problem and maybe a solution?
I`m using R 2.10.0 and the latest Version of e1071
Maybe for your unstated OS with unstated version of e1071 on an
outdated
version of R without a reproducible example given.
For my WinXP, R-2.10.1, e1071 1.5-22 I get:
library(e1071)
data(iris)
model<- svm(Species ~ ., data = iris, type="nu-classification")
model
O.k. - sorry for my sparse information.
I just made an update to R-2.10.1 and e1071 version 1.5-22 on WinXP.
I can reproduce the example with the iris dataset. However R crashes when I
call svm() with my dataset
model<- svm(soil_unit ~ ., data = traindat, type="nu-classification")
My dataset consists of 9259 obs. of 14 variables. My target variable is a
factor variable with 22 levels (multi-class classification). Predictors are 12
numeric and 1 factor variables.
Hoping this information is enough.
Well, you might want to send the *reproducible* example (i.e. including
data that reproduces a crash) to the e1071 maintainer (CCing David).
Maybe he will be unable to help given it is a problem in the underlying
libsvm code in which case it might be better to contact the libsvm
maintainers.
Uwe Ligges
TIM
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