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From: Wayne King on 9 Aug 2010 15:53
"Debora " <debi_can(a)yahoo.com.br> wrote in message <i3pks4$2fv$1(a)fred.mathworks.com>...
> "Wayne King" <wmkingty(a)gmail.com> wrote in message <i3pjit$9sd$1(a)fred.mathworks.com>...
> > "Debora " <debi_can(a)yahoo.com.br> wrote in message <i3pj0j$30v$1(a)fred.mathworks.com>...
> > > Hi, Wayne.
> > >
> > > This is actually driving me insane. I do not have the necessary knowledge to understand the parameters, so I can't change what you wrote to make it work.
> > >
> > > You design - thank you for that - filtered all the signal and did not remove the low frequencies.
> > >
> > > I really don't wanna bother, but I do not know what to do.
> > >
> > > Debi
> > >
> > > "Wayne King" <wmkingty(a)gmail.com> wrote in message <i3pcng$hn8$1(a)fred.mathworks.com>...
> > > > "Debora " <debi_can(a)yahoo.com.br> wrote in message <i3pbpg$i0f$1(a)fred.mathworks.com>...
> > > > > >
> > > > > > Hi Debora, Yes, you can highpass filter the signal, removing everything below 5 Hz. What is your sampling frequency?
> > > > > >
> > > > > > Wayne
> > > > >
> > > > > Hi, Wayne
> > > > >
> > > > > My data was collected using 2000 Hz.
> > > > >
> > > > > Debi
> > > >
> > > > Debi, you can use fdesign.highpass and design() to design your filter.
> > > >
> > > > h = fdesign.highpass('Fst,Fp,Ast,Ap',20,25,60,1,2000);
> > > > d = design(h,'butter');
> > > > % visualize your filter
> > > > fvtool(d)
> > > >
> > > > Removes frequencies below 20 hertz.
> > > >
> > > > Do you need to implement zero-phase filtering? If not, you can implement your filter as:
> > > >
> > > > output = filter(d,input);
> > > >
> > > > Wayne
> >
> > Debi, can you send me an example .mat file?
> >
> > Wayne
>
> Wayne,
>
> How do I do that? You want me to paste my .m file here, or my data as an .m file?
>
> Sorry, I am new to this page..
>
> Debi

Debi, I want you to save your data, or an example of your data a 1-D time series as a .mat file. Say that your data vector is called emgdata, cd to a folder where you have write permission and enter:

>>save emgdata emgdata

This will create a .mat file in the directory. You can just email me that file to my email address. I'll post what I see back in this thread.

Wayne
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