How to insert the mean in a plot?

2020 8 25
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更新时间：2020 8 26
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In this plot I want to insert the mean, the variance and standard deviation of this signal. Is there a particular function or a toolbox that executes it?

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Alan Stevens
Alan Stevens 2020-8-26

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If you signal data is in vector y, say, then
ymean = mean(y);
ystddev = std(y);
yhi = ymean+ystdev;
ylo = ymean-ystdev;
xrange = [0 60]; % or whatever you want
plot(xrange, [ymean ymean],xrange,[ylo ylo], xrange, [yhi yhi])

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