Followup: Re: [R] Interaction Plots in R

[Peter Dalgaard BSA]

Prof Brian D Ripley <ripley at stats.ox.ac.uk> writes:

> The current plan is to put an S-compatible version of interaction.plot
> into 1.1.0.
...
> > I am just curious why nobody brought this interaction plot idea up, since R has be around
> > for quite a few years!
> 
> I think that shows how little interaction plots are used.

..or how easy it often is to get a plot with equivalent information
with matlines(). I actually hadn't noticed the existence of
interaction.plot() before.

We might need a general "trace grapher" including continuous variables
instead of factors and handling unbalanced designs, e.g. plot data vs.
time for each person, with different symbols for different groups.
Maybe also with fixups for missing values, etc. (Now don't tell me
such a thing already exists!)


-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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