[R] How to add a data line (series) to a plot using add=TRUE

Hello, I'd like to use the add=TRUE parameter to add a second data line (series) to an existing plot, but R is giving me an error (see below). This code: rap-plot(aspen_sort,ylim=c(1,1),log=y) ...produces the plot to which I'd like to add the second line. But this code:

Re: [R] How to add a data line (series) to a plot using add=TRUE

add is not a graphical parameter On Tue, Oct 28, 2008 at 3:49 PM, Mark Na [EMAIL PROTECTED] wrote: Hello, I'd like to use the add=TRUE parameter to add a second data line (series) to an existing plot, but R is giving me an error (see below). try (untested):