No BSD License  

Highlights from
Jensen-Shannon divergence

Be the first to rate this file! 24 Downloads (last 30 days) File Size: 1.1 KB File ID: #20689 Version: 1.0

Jensen-Shannon divergence


Nima Razavi (view profile)


13 Jul 2008 (Updated )

Calculates the Jensen-Shannon divergence between two probability distributions

| Watch this File

File Information

The .zip file contains two functions naming JSDiv.m and KLDiv.m

JSDiv.m uses KLDiv.m for calculation of the KL-divergence.

For more information on the divergence you can take a look at the following:

MATLAB release MATLAB 7.4 (R2007a)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Comments and Ratings (1)
15 Sep 2009 Kimberly

Hi ... thanks very much for writing this code and taking the time to post it! I had some trouble in the case where at least one of the entries of P and Q are both 0. In this case the last line of KLdiv.m:

% resolving the case when P(i)==0

sets the divergence to 0, which is clearly not the case e.g. if P = [1 0 1], Q = [0 0 1].

I would suggest changing the last few lines to:

Q = Q ./repmat(sum(Q,2),[1 size(Q,2)]);
P = P ./repmat(sum(P,2),[1 size(P,2)]);
dist = sum(P.*M,2);

which seems to work for me.

Comment only

Contact us