Filtering out y values

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Fabian
Fabian 2023-6-19
评论： Fabian 2023-6-20
Hello all, I'm having some trouble with filtering out some data from the graph attached. Basically, I want to have the graph where it is just the wave through the range of 8-13. Anything below 8 and over 13 I want hidden in the graph. Thank you.

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VBBV
VBBV 2023-6-19
编辑：VBBV 2023-6-19
Ran in:
Here's what you can do to filter y values from a dataset , by applying a condition
x = 0:8e4;
y = 20*rand(length(x),1);
scatter(x(1:1e3:end),y(1:1e3:end),'ko')
idx = y > 8 & y < 13;
y = y(idx);
x = x(idx);
scatter(x(1:1e3:end),y(1:1e3:end),'ko')
ylim([0 20])

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Daniel
Daniel 2023-6-20
Ran in:
If you're just looking for visual zoom, you can use the ylim command to set the y-limits on a graph. xlim works similarly for x-limits.
t = 0:0.01:10;
x = sin(2*pi*t) + randn(size(t)).^2+randn(size(t)).^2;
plot(t,x,'o')
title('Without ylim')
figure
plot(t,x,'o')
ylim([-1.5 5])
title('With ylim')

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