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n3228
2006 Feb 02
0
crossvalidation in svm regression in e1071 gives incorre ct results (PR#8554)
...spread[i] <-
sqrt(mysvm$tot.MSE). I get:
> spread <- rep(0,20)
> for (i in 1:20) {
+ spread[i] <- svm(y ~ x,data, cross=10)$tot.MSE
+ }
> summary(sqrt(spread[i]))
Min. 1st Qu. Median Mean 3rd Qu. Max.
0.2679 0.2679 0.2679 0.2679 0.2679 0.2679
Andy
From: no228 at cam.ac.uk
>
> Full_Name: Noel O'Boyle
> Version: 2.1.0
> OS: Debian GNU/Linux Sarge
> Submission from: (NULL) (131.111.8.96)
>
>
> (1) Description of error
>
> The 10-fold CV option for the svm function in e1071 appears
> to give incorrect
> results f...
2012 Apr 09
1
Panel.abline would not show beyond a certain slope value
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2006 Feb 02
0
crossvalidation in svm regression in e1071 gives incorrect results (PR#8554)
Full_Name: Noel O'Boyle
Version: 2.1.0
OS: Debian GNU/Linux Sarge
Submission from: (NULL) (131.111.8.96)
(1) Description of error
The 10-fold CV option for the svm function in e1071 appears to give incorrect
results for the rmse.
The example code in (3) uses the example regression data in the svm
documentation. The rmse for internal prediction is 0.24. It is expected the
10-fold CV rmse