How to combine two plots in one frame by r?

Question

I can create plots of two groups in one window but I don't know how to combine two plots in one frame with same x and y axis lines. The example is as same as the linked image. I would be grateful if someone can help me to do this with R.

Please click here to view the image

Answer 1

Try, using cbind function

boxplot(cbind(boxplot1, boxplot2))

This will display the two boxplots in same frame with combined x and y axes.

Answer 2

Example:

plot(x,y)
par(new=TRUE)
plot(x,y)