Hi. I want to create a function whose arguments are formulas.

plotz <- function(y,z){

x<- seq(from=-5, to=5, by=.001)

plot(x,y, col="red")

points(x,z, col="blue")

}

f <- exp(x)

g <- exp(x^2)

plotz(f, g)

Not only does this not work, but I get error message that x is not found, presumably at f <- exp(x). How do I fix this? Thank you.

Error: object 'x' not found

Execution halted