[R] multiple lowess line in one plot

MMcIntosh@kvpharmaceutical.com MMcIntosh at kvpharmaceutical.com
Wed Jan 4 20:09:46 CET 2006

## Copy and paste this into R.
plot(cars,main="lowess(modified cars)",col=x1+1)
for(i in unique(x1)) lines(lowess(cars[x1==i,]),col=i+1)

This might help...

Matthew McIntosh

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Dean Sonneborn
Sent: Wednesday, January 04, 2006 10:54 AM
To: r-help at stat.math.ethz.ch
Subject: [R] multiple lowess line in one plot

I'm using this code to plot a smoothed line.  These two columns of data 
really represent 4 groups and I'd like to plot a separate line for each 
group but have them all in the same plot. The R-Docs for lowess do not 
seem to indicate some type of "GROUPS=var_name" option. What would be 
the syntax for this?

plot(AWGT ~ lipid )
lines(lowess(lipid , AWGT, f=.8))

Dean Sonneborn, MS
Programmer Analyst
Department of Public Health Sciences
University of California, Davis
(530) 754-9516

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