Plot two graphs in same plot in R

r plot ggplot2 r-faq
Sandra Schlichting picture Sandra Schlichting · Apr 2, 2010 · Viewed 1.4M times · Source

I would like to plot y1 and y2 in the same plot.

x  <- seq(-2, 2, 0.05)
y1 <- pnorm(x)
y2 <- pnorm(x, 1, 1)
plot(x, y1, type = "l", col = "red")
plot(x, y2, type = "l", col = "green")

But when I do it like this, they are not plotted in the same plot together.

In Matlab one can do hold on, but does anyone know how to do this in R?

Answer

bnaul picture bnaul · Apr 2, 2010

lines() or points() will add to the existing graph, but will not create a new window. So you'd need to do

plot(x,y1,type="l",col="red")
lines(x,y2,col="green")

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