How to add time duration of peaks in plot

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

Answer 1

[Star Strider]

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.

.

[Abdelhakim Souidi]

thank you

when I excute your code I got an error:

"Array indices must be positive integers or logical values".

[Abdelhakim Souidi]

I want to calculate the time duration of each peak and plot it

[Image Analyst]

bar(wdth);

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

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[Star Strider]

@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.

Answer 2

[Image Analyst]

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.