title: How to get rid or alter default axis labels and/or titles in density plot?
body: <p>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). </p>