The filtfilt(d, x) version in the documentation does not seem to work

The filtfilt() function seems to demand 3 inputs (b, a, x) but the documentation says it can also accept a filter object instead of the b,a coefficients. Is this an error in the documentation or in the filtfilt() function itself?

Thanks, Dan

Answer 1

[Dan]

It appears that filtfilt does not accept any and all dsp toolbox filter objects. I just happened to choose one that it does not accept. When that happens it reverts to the filtfilt.m file that expects 3 arguments so you get an unhelpful error message complaining about insufficient number of arguments.

So my question has been answered.