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How to perform the 1-D signal filter? [message #58441]

Fri, 01 February 2008 02:20

duxiyu@gmail.com
Messages: 88
Registered: March 2007

Member

Dear all,

Here I give a signal example and hope somone can show me how to
perferm the frequency filter on it.

;creat a signal data with two peaks in frequency domain at 2 and 3 Hz.
t=findgen(1000)/10.
data=sin(2*!pi*2*t)+sin(2*!pi*3*t)

freq=findgen(501)/100.
v=fft(data)
plot,freq,abs(v[0:500])^2,xtitle='frequency',ytitle='spectru m'

I want to filter the signal with the frequency higher than 2.5 Hz. How
do I do this?

I have read the help files about Digital_Filter and Convol, but I do
not know how to select the parameters for Signal_Filter.

Du

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[Message index]

		How to perform the 1-D signal filter? By: duxiyu@gmail.com on Fri, 01 February 2008 02:20
		Re: How to perform the 1-D signal filter? By: jdu on Mon, 04 February 2008 08:48
		Re: How to perform the 1-D signal filter? By: Wox on Mon, 04 February 2008 01:28
		Re: How to perform the 1-D signal filter? By: jdu on Sat, 02 February 2008 11:27
		Re: How to perform the 1-D signal filter? By: Kenneth P. Bowman on Fri, 01 February 2008 15:27

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