Calculate area under peak

6 vues (au cours des 30 derniers jours)
Amir Cawich
Amir Cawich le 22 Fév 2023
Commenté : Timo Dietz le 22 Fév 2023
I am trying to find the area under the curve as shown in the image. I found the peaks of the signal and plotted the line on the signal. I am looking to calculate the area shaded in green for the entire signal. I have no idea how to do this. Any ideas are welcomed. Thank you
  1 commentaire
Dyuman Joshi
Dyuman Joshi le 22 Fév 2023
For the 3rd area from left, why is the area not a triangle and a quadrilateral?
Because the 4th point is higher than 3rd point?

Connectez-vous pour commenter.

Réponse acceptée

Timo Dietz
Timo Dietz le 22 Fév 2023
Not sure whether I got your issue.
What about resampling (resample command) the red and blue trace to the same x step size.
Then, you only have to subtract the area under the red from the area under the blue trace, respectively, just subtract all indiviudal data points and sum up the differences. To achieve the area you certainly have to finally multiply by the x step size.
  1 commentaire
Timo Dietz
Timo Dietz le 22 Fév 2023
Note, that the accuracy of the area calculation is certainly limited to the chosen x step size (discrete values).

Connectez-vous pour commenter.

Plus de réponses (1)

KSSV le 22 Fév 2023
Read about the functions polyarea, trapz. Provde the (x,y) data of the curve for which you want to calculate the area.


Community Treasure Hunt

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

Start Hunting!

Translated by