Moderator: Statistisches Maschinelles Lernen

xAx
Endlosschleifenbastler
Beiträge: 157
Registriert: 6. Mär 2008 17:20

Which toolboxes can we use? E.g. do I have to recode normpdf(...) or mvnpdf(...)?
Nichts ist wie es scheint!
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Zuletzt geändert von xAx am 14. Mär 2009 16:17, insgesamt 99-mal geändert.

Kevin
Neuling
Beiträge: 2
Registriert: 24. Mär 2010 14:19

### Re: Matlab tasks

Ich glaube "statistic" toolbox

sroth
Dozentin/Dozent
Beiträge: 37
Registriert: 20. Sep 2007 15:00

### Re: Matlab tasks

For problem 2 the use of the statistics toolbox is fine. I.e. you may use mvnpdf (as is also mentioned in the problem text).
For problem 4 you may also use mvnpdf and normpdf, but you should code the classifier and the parameter estimation procedure by hand.

Best regards,
Stefan Roth

cdn
Mausschubser
Beiträge: 55
Registriert: 13. Dez 2008 13:54

### Re: Matlab tasks

what is the exact meaning of 'by hand'? Is it allowed to use the known analytical solution for the parameter estimation for univariate (lecture) / multivariate (bishop book) gaussian distributions (Qi said okay to this last week!) and use the functions std, mean and cov from Matlab to do this calculations?

sroth
Dozentin/Dozent
Beiträge: 37
Registriert: 20. Sep 2007 15:00

### Re: Matlab tasks

Yes, you should use the closed form analytical solution. And it is fine to use std, mean, cov, etc.
What I mean by "by hand" is that you are not allowed to use the NaiveBayes class from the statistics toolbox, the mle function, or similar advanced functions.

I hope that clarifies it,
Stefan Roth