R help - Jun 2006 - supplying dynamic main argument to plot?

All,
 
Simple question but I don't seem to be able to find the answer in the
documentation:
When using "plot" within a loop, is there any way to supply the
argument
to "main" dynamically, 
i.e., so that the title is Patient k below as the loop cycles through
each value of k?
 
plot(x,y, xlim=c(0,250), ylim=c(0,1000), xlab="gamma",
ylab="r1",
main="Patient k")
 
 
thanks
dave
ps - I'm running windows.
 
  

	[[alternative HTML version deleted]]

It is easy to control the main title with plot, but you will
get much better looking plots if you use xyplot.

library(lattice)
tmp <- data.frame(x=rnorm(100),
                  y=rnorm(100,4,2),
                  ID=paste("Patient", rep(1:5, rep(20,5))))
xyplot(y ~ x | ID, data=tmp)


Rich

Hi Dave,

Try using paste within main i.e.

x=rnorm(100)
y=runif(100)
k=sample(1:10,10, replace=T)

for(i in k){
  plot(x,y, xlab="gamma", ylab="r1",
main=paste("Patient", i, sep=" "))
  Sys.sleep(1)
  }


In this eaxmple I am just plotting the same x,y values on each figure but 
you can easily plot the observations for each patient by subetting your data 
by the K variable. See ?"[" for more details on subsetting.

I hope this helps

Francisco


Dr. Francisco J. Zagmutt
College of Veterinary Medicine and Biomedical Sciences
Colorado State University



>From: "Afshartous, David" <afshart at
exchange.sba.miami.edu>
>To: "Afshartous, David" <afshart at exchange.sba.miami.edu>,
><r-help at stat.math.ethz.ch>
>Subject: [R] supplying dynamic main argument to plot?
>Date: Tue, 27 Jun 2006 16:19:12 -0400
>
>All,
>
>Simple question but I don't seem to be able to find the answer in the
>documentation:
>When using "plot" within a loop, is there any way to supply the
argument
>to "main" dynamically,
>i.e., so that the title is Patient k below as the loop cycles through
>each value of k?
>
>plot(x,y, xlim=c(0,250), ylim=c(0,1000), xlab="gamma",
ylab="r1",
>main="Patient k")
>
>
>thanks
>dave
>ps - I'm running windows.
>
>
>
>	[[alternative HTML version deleted]]
>
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