How to calculate partial area-under-the-curve?
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi all,
I am trying to find the area under the curve (AUC) for a part of a graph. I use "trapz" function, but this function calculates the AUC for a entire area below the selected part of the graph. Any hint how I can calculate only part of it (not entire part until x-axis)? Please see figure. Interested are to be calculate is in red.
Thanks, Mehdi
(for simulation of data, just generate a random vector and try a part of it.)
0 commentaires
Réponse acceptée
Mischa Kim
le 22 Mar 2014
Mehdi, use trapz twice to subtract the area below the red marked one (between x-axis and data points y = 0.3111, 0.1848 ) from the entire area.
3 commentaires
Mischa Kim
le 22 Mar 2014
This should do
trapz(data(221:224)) - trapz([221 224],[data(221) data(224)])
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Numerical Integration and Differentiation dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!