[R] adding horizontal lines to a trellis plot

From: Blanchard, Suzette <SBlanchard_at_coh.org>
Date: Thu, 12 Jun 2008 10:52:10 -0700

I would like to add two horizontal lines representing acceptible drug levels to a trellis plot. I tried using abline and I get an error that "plot.new has not been called." See below.  

xyplot(FK~WEEK|Event1/MRN, data=FKdat.o1)

Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, ...) :   plot.new has not been called yet

Any help that can be provided on how to do this would be appreciated.  


Suzette Blanchard, Ph.D.
Assistant Professor, Dept. of Biostatistics City of Hope
1500 East Duarte Rd
Duarte, CA 91010-3000
ph: (626) 256-4673 ext:64446

SECURITY/CONFIDENTIALITY WARNING: \ This message an...{{dropped:24}}

R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 12 Jun 2008 - 17:55:22 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Thu 12 Jun 2008 - 21:31:10 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive