tags:

views:

158

answers:

1
+2  Q: 

MATLAB: creating a graph using fft

I have data for the y axis of a graph and I need to perform FFT on the data to receive a graph.
I don't have much experience with Matlab, any help will be very appreciated.

+4  A: 

http://www.mathworks.com/access/helpdesk/help/techdoc/ref/fft.shtml

http://www.ele.uri.edu/~hansenj/projects/ele436/fft.pdf

ufukgun  2009-12-29 13:08:54
Thanks, I'll research into the matter.
Inbal  2009-12-29 13:16:48
The matlab example above is great because: it shows how to make the x-axis vector for frequency to plot against the spectrum data, takes in to account plotting the magnitude of the data, cuts off the complex conjugates so you don't get a mirrored image, and will calculate the next power of 2 to use to make the calculation more efficient.It might also be helpful to check out pwelch for a power spectral density
Fuzz  2009-12-29 13:17:25

related questions

Best MATLAB toolbox that implements Support Vector Regression?
What is the simplest way to export Excel data to Matlab?
Why do I get this error message in matlab?
In Matlab, what does zpk([], [i, -i], 1) mean?
Running on 32 or 64 bit matlab?
Creating output m-file in matlab
Reading input m-file in a main m-file
What is MATLAB good for? Why is it so used by universities? When is it better than Python?
matlab FFT. Stuck understanding relationship between frequency and result
In MATLAB, how do I change the background color of a subplot?
mathematical optimization library for Java --- free or open source recommendations?
MATLAB Environment Tweaks
Why don't I see a significant speed-up when using the MATLAB compiler?
How can I sort a 2-D array in MATLAB with respect to one column?
What are your favourite MATLAB/Octave programming tricks?
In MATLAB, can a class method act as a uicontrol callback without being public?
How can I generate a list of function dependencies in MATLAB?
What alternatives are there to the MATLAB Editor?
Open source alternative to MATLAB's fmincon function?
Can parallel traversals be done in MATLAB just as in Python?
Running a Simulink xPC block at a faster rate than the continuous rate
How do I change Simulink xPC target serial comm speed on the fly
What are some efficient ways to combine two structures in MATLAB?
How can I stop MATLAB from returning until after a command-line script completes?
Anyone have experience creating a shared library in MATLAB?