Thread Subject: Filter Function in matlab

Hi All,

I want to filter my signal with low pass filter. ( Window method). I calculated the coefficient of the filter. ( b ) I want to know the theoretical behind the filter function of matlab that gets the filter coefficient and the input signal.

I would really appreciate your help.

Cheers,
Khatereh

On 26 Nov, 21:16, "khatereh " <khaterehkhodaverdi2...@gmail.com>
wrote:
> Hi All,
>
> I want to filter my signal with low pass filter. ( Window method). I calculated the coefficient of the filter. ( b ) I want to know the theoretical behind the filter function of matlab that gets the filter coefficient and the input signal.
>
> I would really appreciate your help.

Google for "FIR filter", "Digital signal processing".

Rune

"khatereh " <khaterehkhodaverdi2008@gmail.com> wrote in message <jarhe8$171$1@newscl01ah.mathworks.com>...
> Hi All,
>
> I want to filter my signal with low pass filter. ( Window method). I calculated the coefficient of the filter. ( b ) I want to know the theoretical behind the filter function of matlab that gets the filter coefficient and the input signal.
>
> I would really appreciate your help.
>
> Cheers,
> Khatereh

The reference page for filter tells you exacty what filter does.

Dear khatereh,

You can find an M-version of FILTER here:
  http://www.mathworks.com/matlabcentral/newsreader/view_thread/311306
A faster C-Mex, which even beats Matlab's FILTER:
  http://www.mathworks.com/matlabcentral/fileexchange/32261-filterm

 Kind regards, Jan