[R] null plotting symbol ?
andy_liaw at merck.com
Mon May 5 22:37:32 CEST 2003
Don't know why you need to do that, as it seems to me that's why you pass a
vector to pch, etc., so you won't have to come back and use points().
Anyway, using NA would work. (However, I suspect I still don't understand
> -----Original Message-----
> From: tblackw at umich.edu [mailto:tblackw at umich.edu]
> Sent: Monday, May 05, 2003 4:23 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] null plotting symbol ?
> I am calling plot() with argument pch as a vector of numeric
> symbol codes, the same length as x and y. Is there some code
> which produces no symbol - a blank - so that I can come back
> with a second call to points() and fill in these locations
> using a different fill color and a different symbol size ?
> There's always a work-around, but both x and y are generated
> on the fly by calls to cumsum(), so it's inconvenient to put
> NAs into either x or y to suppress plotting that way. Guess
> I should *try* mixing numeric and character symbol codes,
> although the example in help("points") explicitly uses a list
> at that point.
> THX - tom blackwell - u michigan medical school - ann arbor -
> R-help at stat.math.ethz.ch mailing list
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