# generating aperodic impulse train or triangular pulse or rectangular pulse

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LAKSHMAN on 22 Aug 2014
Commented: LAKSHMAN on 26 Aug 2014
Hello all,
I want to generate aperodic signal of type impulse train or triangular pulse train or rectangular pulses train. i.e. time period b/w samples should vary for every 2 samples. I want to find frequency content from that signal by using FFT. I am new to matlab coding. Could anyone plz explain me how to generate the signal... Rest FFT and signal analysis i can do.
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Rick Rosson on 23 Aug 2014
Do you have the Signal Processing Toolbox?
LAKSHMAN on 25 Aug 2014
yes i have.. but when i searched for any wave it is showing only periodic signals..

Image Analyst on 26 Aug 2014
Attached is my triangle wave demo. Feel free to adapt it as needed.

Rick Rosson on 23 Aug 2014
doc rectpuls
doc tripuls
doc pulstran
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Rick Rosson on 26 Aug 2014
LAKSHMAN on 26 Aug 2014
I have studied these docs.. Understood more compared to previous.. Thank you Rick..

W. Owen Brimijoin on 25 Aug 2014
It's a bit hard to know exactly what parameters you are after, but if all you are doing is making a click train with randomly chosen interstimulus intervals (ISI), then you may be able to get there by creating a vector with randomly chosen integers drawn uniformly from a range.
isi_range = [10 100]; %range from smallest to largest isi (in samples)
num_clicks = 100; %number of clicks you want
%figure out when your clicks are:
click_times = cumsum(randi(isi_range,num_clicks,1));
%set an empty variable to 1 at those points:
signal(click_times) = 1;

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