Simple operation with vectors

I have two vectors, x and y, and I plot the function y=f(x) with the command plot(x,y). I need to know what is the value of x corresponding to the maximum value of y. For example if

x=[1.2 1.4 1.6 2.5 3.7]

and

y=[3.2 4.8 5.6 4.4 3.1],

then I have to obtain 1.6, since the third element of x corresponds to the maximum value of y. How can I implement this command? Thanks

Answer 1

[W. Owen Brimijoin]

Location of the max y values as the index into x:

x(y==max(y))

[aurc89]

Thank you