implementing multistage multirate filters

I am in need of an source code than can be used to implement an multistage multi rate filter, can any one help me.

Answer 1

[Honglei Chen]

Here is an example you may find useful

http://www.mathworks.com/help/dsp/ug/example-case-for-multiratemultistage-filters.html

Answer 2

[Puneet Rana]

A more detailed example is here:

http://www.mathworks.com/help/dsp/examples/multistage-design-of-decimators-interpolators.html