R help - Aug 2009 - Surpress one panel in lattice plot..?

Dear list,

I have a two character vector with two different values in them (two
each, that is). Naturally, when I use these vectors as grouping
factors in a lattice plot, I get four panels.
Now, one of the possible four combinations will never have data, so
one panel will always be empty. So now my question is: can I force R /
Lattice not to print it, and give me only the 3 filled panels?

I have tried adding "layout=c(3,1)" to the list of arguments, but that
gives me one plot that looks like I want it to, and then a new plot
with just the empty panel. I use this in an odfWeave document, so just
getting the last (empty) plot in the output is not really what I want.

I do of course appreciate all the help I can get on this.

/Fredrik

-- 
"Life is like a trumpet - if you don't put anything into it, you
don't
get anything out of it."

Fredrik Karlsson wrote:
> 
> Dear list,
> 
> I have a two character vector with two different values in them (two
> each, that is). Naturally, when I use these vectors as grouping
> factors in a lattice plot, I get four panels.
> Now, one of the possible four combinations will never have data, so
> one panel will always be empty. So now my question is: can I force R /
> Lattice not to print it, and give me only the 3 filled panels?
> 
> I have tried adding "layout=c(3,1)" to the list of arguments, but
that
> gives me one plot that looks like I want it to, and then a new plot
> with just the empty panel. I use this in an odfWeave document, so just
> getting the last (empty) plot in the output is not really what I want.
> 
> I do of course appreciate all the help I can get on this.
> 
> 
One possibility would be to assign the factor interaction explicitly
to a variable  (mydata$interact = with(mydata,interaction(f1,f2)) or f1:f2) 
and group by the interaction (which
will be missing the empty group) rather than by the two groups

  Ben Bolker

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On Sun, Aug 23, 2009 at 5:41 PM, Ben Bolker<bolker at ufl.edu>
wrote:
>
>
>
> Fredrik Karlsson wrote:
>>
>> Dear list,
>>
>> I have a two character vector with two different values in them (two
>> each, that is). Naturally, when I use these vectors as grouping
>> factors in a lattice plot, I get four panels.
>> Now, one of the possible four combinations will never have data, so
>> one panel will always be empty. So now my question is: can I force R /
>> Lattice not to print it, and give me only the 3 filled panels?
>>
>> I have tried adding "layout=c(3,1)" to the list of arguments,
but that
>> gives me one plot that looks like I want it to, and then a new plot
>> with just the empty panel. I use this in an odfWeave document, so just
>> getting the last (empty) plot in the output is not really what I want.
>>
>> I do of course appreciate all the help I can get on this.
>>
>>
>
> One possibility would be to assign the factor interaction explicitly
> to a variable ?(mydata$interact = with(mydata,interaction(f1,f2)) or f1:f2)
> and group by the interaction (which
> will be missing the empty group) rather than by the two groups
In this case, another quick workaround would be to use
layout=c(3,1,1), although that would not easily generalize.

-Deepayan