# Random Non-periodic waveform

3 views (last 30 days)
Muhammad Atif on 7 Apr 2020
Commented: Star Strider on 10 Apr 2020
How can I draw this waveform, it is a non periodic signal with the intervals like this {[1.54,2.49], [4.97,5.88], [6.69,7.98], [8.05,8.25],[8.58,9.09], [10.48,10.86], [11.16,12.97], [14.51,15.24],[15.38,15.60], [17.20,17.74], [19.16,22.38], [23.69,23.73],[24.59,25.47], [25.59,26.22], [26.65,29.27]}, these intervals are the starting and ending pionts of shaded area.

Star Strider on 7 Apr 2020
Edited: Star Strider on 7 Apr 2020
Try this:
C = {[1.54,2.49], [4.97,5.88], [6.69,7.98], [8.05,8.25],[8.58,9.09], [10.48,10.86], [11.16,12.97], [14.51,15.24],[15.38,15.60], [17.20,17.74], [19.16,22.38], [23.69,23.73],[24.59,25.47], [25.59,26.22], [26.65,29.27]};
figure
hold all
for k = 1:numel(C)
patch([C{k} flip(C{k})], [0 0 1 1], [1 1 1]*0.8, 'EdgeColor','none')
end
hold off
It reproduces the image you posted, so I will not re-post it here.
EDIT — Added pulse train plot.
To draw it as a pulse train:
figure
hold all
for k = 1:numel(C)
plot([[1 1]*C{k}(1) [1 1]*C{k}(2)], [0 1 1 0], 'k')
end
hold off
grid
.

Star Strider on 7 Apr 2020
I’m sorry. I still do not understand. What generates the ‘g’ and ‘b’ vectors?
Muhammad Atif on 8 Apr 2020
Brother I just need to create a random non-periodic waveform looks like the reference picture
Star Strider on 8 Apr 2020
I am still not certain what you want.
Try this:
N = 25; % Number Of Segments
g = rand(1,N);
b = rand(1,N);
C = mat2cell([cumsum(g+b); cumsum(g+b)-b]', ones(1,size(g,2)), 2);
figure
hold all
for k = 1:numel(C)
patch([C{k} flip(C{k})], [0 0 1 1], [1 1 1]*0.8, 'EdgeColor','none')
end
hold off
set(gca,'Layer','top', 'Box','on') % Put Axes On Top Of ‘patch’ Objects
legend('DoS')
figure
hold all
for k = 1:numel(C)
plot([[1 1]*C{k}(1) [1 1]*C{k}(2)], [0 1 1 0], 'k')
end
hold off
grid

Muhammad Atif on 10 Apr 2020
Hi Sir,
Can I plot it by using ones and zeros function separately? I mean first define the duration for which it is one and then define the duration for which it is zero. After that add up them on the whole interval. Or any other method to do this, any loop(if-else) that can help to slove it more simply.

#### 1 Comment

Star Strider on 10 Apr 2020
I do not understand what you want. The code I wrote is about as simple as I can create it, unless there is information about this that has so far not been posted. The loops are necessary because of the nature of the data. Each interval must be plotted individually in the patch call.