axis between plot and surve

#1

Hi

i dont understand how to give plot and curve exactly the same axis

plot(x=tout$x,y=tout$y,
     xlab="x",ylab="y",
     main="",
     ylim = c(0, 10),
     xlim = c(0, 5000)))
abline(bchapxy,achapxy,col="orange")
par(new=TRUE)
curve((log(x)-bchapzt)/achapzt, 0, 5000, n = 200,col="green")

do not work

#2

omit par(new=TRUE)
and use add=TRUE as a further param of curve()

#3

Fantastic and simple, thanks you very much

#4

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