[R] null plotting symbol ?
tblackw at umich.edu
Mon May 5 22:23:27 CEST 2003
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 -
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