matlab code for chi-square distance

I am doing project on content based image retrieval. In that i need to find the distance between the histograms of query image and the database images. I want to use the chi-square distance to find the distance between the images. so please provide me matlab source code for chi-square distance. thanks in advance

Answer 1

[KSSV]

http://www.cs.columbia.edu/~mmerler/project/code/pdist2.m

[Sashank]

Sir, please let me know how to find the similarity after getting the dist matrix

Answer 2

[Mohammad Bhat]

We are getting a lot of values in after using chi-square comparison between histograms...How to get a single value, in order to take a decision...