| Re: SVM with ENVI [message #74369] |
Thu, 13 January 2011 05:47 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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frasca writes:
> When I apply ENVI_SVM_DOIT function programmatically, it gives me
> different results that when I run SVM directly from ENVI. I have try
> with different kernels and parameters, settings the same parameters to
> ENVI_SVM_DOIT and to the interactive SVM from ENVI menu, but their
> give different accuracy results by a small quantity, about 0.3%. Does
> anyone knows why this is so?
It has often been my experience that the programmatic
interface produces different results than the interactive
interface in ENVI. I presume this is because ENVI
programmers don't use their own API.
> Could that it be due to a different
> implementation for the command ENVI_SVM_DOIT and the interactive
> function from ENVI?
This is the conclusion I think you have to reach.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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