Dear Pawel:
yes, this is a bug. Fixed in the next release.
Thanks
David
-
Dear All:
I found a problem with the SVM internal cross-validation (CV) accuracy
estimation in the e1071 package.
File: Rsvm.c
Line: 120
Today, it is:
int j = rand()%(prob->l
a = 0, gamma =
> 0)$alpha);
> alpha alpha alpha alpha
> 48.8798912 48.8798912 48.8798912 0.6881547
>
> Note that by applying a shift, I also obtained varying values of alpha,
> similar to that of what David achieved by changing the initial conditions.
>
&g
912 48.8798912 48.8798912 0.6881547
Note that by applying a shift, I also obtained varying values of alpha,
similar to that of what David achieved by changing the initial conditions.
Thanks
-John
On Fri, May 16, 2008 at 4:20 AM, David Meyer <[EMAIL PROTECTED]>
wrote:
I get John's valu
3464,
>> 0,
>> 0,
>> 0.0143329658213892,
>> 0.0330459770114943,
>> 0,
>> 0,
>> 0,
>> 0,
>> 0.0109890109890110,
>> 0,
>> 0.00118623962040332,
>> 0.007380073800738,
>> 0.00695410292072323,
>> 0.0104895104895105,
>
ers(x, beta = 0, gamma = 0);
m$alpha
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--
Dr. David Meyer
Department of Information Systems and Operations
Vienna University of Economics and Business Administration
Augasse 2-6, A-1090 Wien, Au
>
> First: this is not a bug, more a feature request.
[not in R as correctly pointed out, so just for the records:]
It _is_ a bug (in e1071), since svm() is indeed supposed to support
sparse data. The bug was introduced in 1.5-9 I think when support for
correct na-handling was added. The bug wil
[...]
> Maybe we (the R-foundation) should give serious thoughts to
> offer prizes for valid bug reports during alpha and beta
> testing. These could include
> - Reduced fee for 'useR' and 'DSC' conferences
> - being listed as helpful person in R's 'THANKS' file
> {but that may not entice those
Is topics...
This topic should certainly be taken into account. We just want to wait
for all submissions, so we can better decide on what will suit best the
topic (or subtopics, if any): sessions, islands, round-tables ...
So I hope the abstracts will be coming in!
Cheers,
David
--
Dr. David
