Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: ETFE and Frequency Data - Resolution of Frequency
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
ms

Posts: 61
Registered: 11/6/06
ETFE and Frequency Data - Resolution of Frequency
Posted: Jan 5, 2013 3:46 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I am using the ETFE function to look at the frequency response of my data. I am using 2048 points and the sampling rate is 100Hz (1/100sec). My code looks like this:

ETFE_DATA = etfe(data, 100, 2048);

I noticed the Frequency has a resolution of of 50/2048 (or 0.0244Hz). Shouldn't the resolution be twice that, 50/2048 0.0488Hz?

Similar in the help for FFT, to create your frequency vector you would use:

(100/2)*linspace(0,1,2048/2+1)%you will see the frequency increments are 0.0488Hz.

Thanks!



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.