Problem with interaction.plot()

Fri, Feb 8, 2002 4:44 PM

You can get around this problem by specifying the summary function used by
interaction.plot :

	mean.rm.na <- function(x) mean(x,na.rm=T)
	interaction.plot( A, B, Y )

-Greg

-----Original Message-----
From: Kaiya Liu [mailto:liu.262 at osu.edu]
Sent: Friday, February 08, 2002 4:57 PM
To: Uwe Ligges
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Problem with interaction.plot()


Thank you very much --- I thought it was just me not doing 
the right thing.

Another related problem with the interaction.plot () 
function. It doesn't 
plot for the group that has one for more missing values. Say 
I have a Y 
variable and two factors A and B, where A has 3 levels and B has two 
levels. There are a few missing values for Y when B is at 
level 1. When you do
         interaction.plot (A, B, Y)
you will have a plot missing the lines for B = 1.

Kaiya Liu



At 02:07 PM 2/8/02 +0100, Uwe Ligges wrote:

Kaiya Liu wrote:

Hi,

I encountered a problem when I did interaction plots using the
interaction.plot() function. The labels for the trace

factor appeared on

the plot when I did the plots in separate windows, but

disappeared/cut off

when multiple plots were placed in one window. Can

anybody help me?

The calculation of the width of the legend is really

difficult in that

case in goes wrong, because it is based on heuristics for a

single plot.

I'll send a bug report in a few minutes.

As a workaround I'd suggest to use interaction.plot(...,

legend=FALSE)

and add a legend with legend() manually.

Uwe Ligges
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