I need the value of a changing variable at a specific value

clc
clear
close all

AR = 5;
Cl = [0:0.01:1.7];
Cd = 0.04 + (1.26/(pi*AR))*Cl.^2;

LDR = Cl./Cd;

max(LDR)


plot(Cd, Cl,'r')
grid on
xlabel('Cd')
ylabel ('Cl')

I need the value of Cl at the point LDR is at its max value

I have no idea how to find this

Answer 1

[KALYAN ACHARJYA]

The value is

Cl_val=Cl(find(LDR==max(LDR)))