Question

I would like to know, how can I alter “default” x label (or subtitle) in density plot in R.
For example, I do not wand this text “N = …, bandwidth = …” to be on the plot (I do not know if it is x-label or subtitle, but it usually appears under x-axis).

Answer 1

You should just use the standard plotting arguments to change the labels:

plot(density(rnorm(10)), 
     xlab="X", #Change the x-axis label
     ylab="Density", #y-axis label
     main="A nice title")#Main title

See the plotting help page: ?plot and the documentation.