How to plot x and y with x evaluated in a function

It seems to be such an easy thing but I can't right remember

So, I've got an array of x values (2708x1) and y values(2708x1) and a function Amp(x). How to plot(Amp(x),y) ?

Answer 1

[madhan ravi]

x = ...;
y = ...;
plot(Amp(x),y)

[Niklas Kurz]

Thank you for you help, however something still goes wrong:

Amp = (6.344*10^(-7)*x^6 + 3.938*10^(-5)*x^5 -0.001053*x^4 -0.01953*x^3 + 0.2699*x^2 +  -13.92*x + 502.4);
x = M{:,1};
y = M{:,2};
plot(Amp(x),y)

[Niklas Kurz]

I could type

Ampx =  (6.344*10^(-7)*x.^6 + 3.938*10^(-5)*x.^5 -0.001053*x.^4 -0.01953*x.^3 + 0.2699*x.^2 +  -13.92*x + 502.4);

and then

plot (Ampx, y)

But isn't there a faster way?

[Niklas Kurz]

I guess I posed my question in the wrong way, I'll re-ask it. Thank you for your effort :)

[madhan ravi]

 Amp = @(x) 6.344*10^(-7)*x.^6 + 3.938*10^(-5)*x.^5 -0.001053*x.^4 -0.01953*x.^3 + 0.2699*x.^2 +  -13.92*x + 502.4;
 x = M{:,1};
 y = M{:,2};
 plot(Amp(x),y)