I always wondered how such pictures are made:
I am working with the R programming language. I would like to plot a parabola with "random noise" added to the parabola. I tried something like this:
x = 1:100 y = x^2 z = y + rnorm(1, 100,100) plot(x,z)
But this is still producing a parabola without "noise".
Can someone please show me how I can add "noise" to a parabola (or any function) in R?
In this case you need to generate 100 random points or will be adding the same amount of noise to each point (thus no noise). z = y + rnorm(100, 100,100)
x = 1:100 y = x^2 z = y + rnorm(length(y), 100,100) plot(x,z)