how to find and mark the value of local minimums in a graph of multiple data ?

3 views (last 30 days)
reema shrestha
reema shrestha on 15 Feb 2018
Answered: Chris Turnes on 15 Feb 2018
I have a graph of multiple data taken experimentally. Now I want to find the troughs of the graph. I want to show the value of local minimas in the graph. How do I do it?

Accepted Answer

Birdman
Birdman on 15 Feb 2018
Try this:
x=randi([1 7],1,10);
y=randi([3,10],1,10);
plot(x);hold on;plot(y);
[~,idxX]=findpeaks(-x);
[~,idxY]=findpeaks(-y);
plot(idxX,x(idxX),'o');plot(idxY,y(idxY),'o')
hold off;

More Answers (1)

Chris Turnes
Chris Turnes on 15 Feb 2018
If you have access to R2017b, you might also consider checking out the islocalmin function.

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!