R help - Aug 2009 - Erros with RVM and LSSVM from kernlab library

Hello,

In my ongoing quest to develop a "best" model, I'm testing various
forms
of SVM to see which is best for my application.

I have been using the SVM from the e1071 library without problem for 
several weeks.

Now, I'm interested in RVM and LSSVM to see if I get better performance.

When running RVM or LSSVM on the exact same data as the SVM{e1071}, I 
get an error that I don't understand:

Error in .local(x, ...) : kernel must inherit from class 'kernel'

Does this make sense to anyone?  Can you suggest how to resolve this?

Thanks!

-N

Hi,

On Aug 19, 2009, at 1:27 PM, Noah Silverman wrote:
> Hello,
>
> In my ongoing quest to develop a "best" model, I'm testing
various
> forms of SVM to see which is best for my application.
>
> I have been using the SVM from the e1071 library without problem for  
> several weeks.
>
> Now, I'm interested in RVM and LSSVM to see if I get better  
> performance.
>
> When running RVM or LSSVM on the exact same data as the SVM{e1071},  
> I get an error that I don't understand:
>
> Error in .local(x, ...) : kernel must inherit from class 'kernel'
>
> Does this make sense to anyone?  Can you suggest how to resolve this?
Sure, it just means that whatever you are passing as a value to the  
kernel= parameter of your function call is not a kernel function (that  
kernlab knows about).

Did you rig up a custom kernel function? If so -- be sure to set its  
class properly. Otherwise, can you provide something of a self- 
contained piece of code that you're using to invoke these functions  
such that it's giving you these errors?

-steve

--
Steve Lianoglou
Graduate Student: Computational Systems Biology
   |  Memorial Sloan-Kettering Cancer Center
   |  Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact