LDA toolbox for MATLAB

The Matlab topic modeling toolbox is the only one that I know of. It works well and was co-created by my advisor Tom Griffiths.

If you need to run LDA on largish datasets, I would really recommend using C instead of Matlab, though.

This is a toolbox (more like some functions) that implement quite nice the first paper published by Blei, Ng and Jordan.

http://chasen.org/~daiti-m/dist/lda/

I have met the guy, and while the functions are quite basic, is a great tool to understand how LDA works, if your trying to understand the basics you should try it.

I'm not sure if there is a 'best' toolbox. However, the toolbox identified by Kevin is certainly one of the more extensive, is a great place to start, and has a great pedigree. Another well trusted source is Yee Whyte Teh's software page . I recall wandering through the routines from both sources a few years ago when I was trying to understand some of the possible quirks associated with implementation.