# Calculating time duration of a signal

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Tom richards on 14 Jul 2019
Edited: Tom richards on 18 Jul 2019
I would like to calculate the time duration of a signal. In the example below, I want to write in a 2 column matrix the signal and the duration for the purposes for plotting a histogram.
signal=[0 0 0 1 1 1 1 0 1 1];
Output I'd like to see:
signal duration(ns)
0 3
1 4
0 1
1 2
This is my code so far, I'm stuck at trying to calculate the actual duration. I dont know how to calculate time in between when 0 transitions to 1 and vice versa.
duration=[];
signal=[0 0 0 1 1 1 1 0 1 1];
for c=1:length(signal)
diff=signal(c+1)-signal(c);
if diff~=0
????
end
end
dpb on 14 Jul 2019
Look for FileExchange (FEX) submittal "runs"...

infinity on 14 Jul 2019
Hello,
You also could refer this code to get the output
clear
signal=[0 0 0 1 1 1 1 0 1 1];
n = length(signal);
a = diff(signal);
b = find(a);
output = [signal(b) signal(end); diff([0 b n])]'
Tom richards on 14 Jul 2019
Hi,
Your code definitely worked on a large data file as well.
Thanks very much!

R2019a

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