Filtfilt function in matlab 2011b not working the same as from version 7.

Help!

I am using simplefilter (with the filtfilt function embedded) to filter data. Cut off freq of 40Hz, with a 3rd order filter.

Originally I had been using version 7 codes. I have updated matlab to version 2011b and now when I use simplefilter, the data appear unfiltered.

The function runs with no errors, however the data are not filtered in the same way as before.

Have the input arguments changed?

Anyone else have the same problem with filtfilt?

Answer 1

[Wayne King]

Hi Taryn, filtfilt() was substantially changed in the R2011a release. Can you provide an example to illustrate where data appear filtered in a pre R2011a release but not in R2011b?