"SVM: How to write weight table"

Legacy User

I run LibSVM and get a tab 'Kernel Model'.

How do I write the content (weight table, support vector table) to a file in a tabular format?
Or alternatively, how would I decode these tables from a model XML file? Is there a documentation for that?

Thanks for any help!                              Stefan

IngoRM

Hi,

maybe this is enough:

just select one cell in the graphical view and press Ctrl-A (select all cells, alternatively you can select them by dragging your mouse), then press Ctrl-C (copy) and insert the contents into Excel / OpenOffice / ...

From there you can save the file. This of course does not work for automatic processes. For writing those tables into files in a fully automated fashion, you could use the Reporting Engine / Reporting Operators available in the Enterprise Edition only.

Cheers,
Ingo

Legacy User

Ingo,

thanks for the quick reply. Indeed, I'm looking for a programmatic solution to allow post-processing. So, I'm probably left with the option of looking into the XML file of the model... (Enterprise seems to create HTML and PDF only? - in any case, I wouldn't have the $$ right now  )

Btw., the .mod files lack the closure </object-stream> in RM 1.42

Kind regards                            Stefan

IngoRM

Hi,

an additional note: at least the JMySVM operator provides a parameter "calculate_weights" which will deliver the normal vector coefficients. A similar result can be obtained from the SVMWeighting operator. For the support vectors, you could also think of writing a new operator deriving the support vectors from the kernel model. This might be actually easier than extracting the SV from the XML file. Just a few thoughts,

Cheers,
Ingo