Plot a Curve and choose random points on it

I should find a curve that: * _for each value of x ---> one or more values on y_ * . It is not necessary that i plot the curve. I have to choose randomly some points on the curve and memorize it too.

How to do it?

Answer 1

[Azzi Abdelmalek]

Example

x=0:10
y=sin(x)
n=numel(y)
random_samples=y(randperm(n,randi(n)))

[Antonio]

but how to write a curve that for each value of x ---> more values on y? Can i have an example?

[Azzi Abdelmalek]

You are asking, I think you have to give an example to explain what you want