Matlab tasks

[xAx]

Which toolboxes can we use? E.g. do I have to recode normpdf(...) or mvnpdf(...)?

[Kevin]

Ich glaube "statistic" toolbox

[sroth]

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]

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]

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