[R] Decreasing my personal entropy ...

[Warnes, Gregory R]

Lattice plots and trellice plots are actually displayed by thier 'print'
methods.  So, to get ta plot to be displayed in a non-interactive context,
such as a script, explicitly call print on the results of the plot command.

-Greg

-----Original Message-----
From: Gunter, Bert
To: R-Help (E-mail)
Sent: 1/31/03 8:45 AM
Subject: [R] Decreasing my personal entropy ...

R-Listers:

A very minor -- and maybe silly -- question just for personal
enlightenment.

In S (either R or S-Plus, AFAIK) when one types or pastes a trellis
graphics
command into the commands/console window, the graph is automatically
produced:
e.g.,

trellis.device(...)
xyplot(y~x)

If one puts these in a function and calls the function, the same occurs.
However, if one sources in these command from a file (i.e., using
source()),
automatic printing does not occur; one must explicitly call
print(xyplot(y~x)) . Why do things work this way?  

Many thanks.

Bert Gunter
Biometrics Research RY 84-16
Merck & Company
P.O. Box 2000
Rahway, NJ 07065-0900
Phone: (732) 594-7765
mailto: bert_gunter at merck.com

"The business of the statistician is to catalyze the scientific learning
process."      -- George E.P. Box


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