Random numbers around y-values

Hello, I've got a set of y-values. I'd like Matlab to plot random numbers around these y-values (max difference:15%). For you info: y values are given in a .txt file (let's say 100x1). Thx in advance

Answer 1

[Ameer Hamza]

Try this

x = 1:100;
y = log(x);
noise = (2*rand(size(y))-1).*0.15.*y;
y_noise = y + noise;

plot(x, y, 'r', x, y_noise, 'b+')

[Niklas Kurz]

A Huge thanks to you.

[Ameer Hamza]

I am glad to be of help!

[Niklas Kurz]

Just one thing is striking me: if I type x = 1:10 matlab sets all natural numbers between 1:10. What if I want a slower step rate like 0.1 -wise. ?

[Ameer Hamza]

For that, syntax is

x = 0:0.1:10;

Read these links

https://www.mathworks.com/help/matlab/ref/colon.html

https://blogs.mathworks.com/loren/2006/11/10/all-about-the-colon-operator/