How to add time duration of peaks in plot

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Abdelhakim Souidi
Abdelhakim Souidi 2022-6-12
评论： Star Strider 2022-6-13
Hi
I have a a vector containing time duration of each peak duration
g = [0.8432 0.6010 0.2447 0.2274 0.1081 0.1025 0.0818 0.0800];
and I want to that duration figure in my signal plot as the figure below:
So,how can I do it please

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回答（2 个）

Star Strider
Star Strider 2022-6-13
Ran in:
I am not certain what you want.
Try this —
x = linspace(0, 20, 250);
ctrv = rand(3,1)*18;
y = sum(exp(-(x-ctrv).^2./rand(3,1))); % Generate Gaussian Peaks With Random Widths & Locations
[pks,locs,wdth] = findpeaks(y, 'WidthReference','halfheight'); % Calculate Peak Locations & FWHM Values
figure
plot(x, y)
grid
text(x(locs), pks/2, compose('%.1f',wdth), 'Horiz','center', 'Vert','bottom') % Write The FWHM Values At The Appropriate Locations On The Plot
This writes the full-width-half-maximum values at the coordinates of those values. See the documentation on the text function for details. Make appropriate changes to work with your data.
.
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Image Analyst
Image Analyst 2022-6-13
bar(wdth);
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Star Strider
Star Strider 2022-6-13
@Abdelhakim Souidi — With respect to your earlier Comment, my code works correctly, as demonstrated. I have no idea what you are doing, so I cannot determine what the problem is with your using it.

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Image Analyst
Image Analyst 2022-6-12
Not sure how you're defining the width but you can fall down each side of the peak (with a for loop) until you hit a certain level, like 0.5. Or do it like this:
props = regionprops(signal > 0.5, 'Area');
peakWidths = [props.Area]
Or you can fall down from the peak (on each side with a for loop) until the value no longer decreases.

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