Finding Corresponding x axis values of a constant curve on Y-axis
5 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello,
I have a curve similar to shown below in the image.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/311996/image.jpeg)
I plan to find the 'x' values at which the function 'y' is maximum
I have denoted 'y' by 'cylpressure'
When i write the following,
[y,x] = max(cylpressure);
It returns me values
y = 400000
x= 118
But i need the values of 'x' when y starts to get constant(i.e. at x = 118, which i got from above code) and when y starts dwelling down(i.e at x = 180)
What changes must be done?
0 commentaires
Réponses (1)
KSSV
le 8 Juin 2020
Let (x,y) be your data. Where y is cylpressure Dont use
[y,x] = max(cylpressure);
Rather, use:
[val,idx] = max(cylpressure);
In the baove val gives you maximum value of y and idx gives you index of the maximum value. You can get the respective value of x using x(idx).
If you know the value of x and you want to get corresponding y value use interp1.
yi = interp1(x,y,xi) ;
4 commentaires
Sarah Nasra
le 1 Jan 2023
how we can do the opposite? if i know the y value and want to extract the x value?
Voir également
Catégories
En savoir plus sur Annotations 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!