fourier transform info or data

Simple question for those that are familiar with fourier transform. how do i do a fourier transform on this data below, ts=time, ft=amplitude.

    ts = [-10 -5 -5 5 5 10];
    ft = [0 0 1 1 0 0 ];
    plot(ts,ft);

Answer 1

[Image Analyst]

Call fft(), but first get rid of duplicate y values for a given x value. Then you should see the sinc function you are expecting.

[harley]

thanks for replying, what coding would you recommend to stream line what i am trying to do?

[Image Analyst]

Did you try

fouriertransform = fft(ft);

??? Then look up fft and see what you learn. Also see Steve's blog on FFT: http://blogs.mathworks.com/steve/category/fourier-transforms/ and these sites:

http://sharp.bu.edu/~slehar/fourier/fourier.html

http://www.cv.nrao.edu/course/astr534/FourierTransforms.html

http://www.mathworks.com/matlabcentral/fileexchange/28810-fourier-transform-demonstration/content/fourier_demo/html/fourier_demo.html

[harley]

thanks

[harley]

when i get rid of duplicate y values i get the error,

Vectors must be the same lengths.

how do i get around this.

[Image Analyst]

Are you trying to plot the time domain signals? Then you must get rid of the corresponding ts values also.

Answer 2

[Azzi Abdelmalek]

plot(t,f)

%or

stem(t,f)

[harley]

thanks Azzi