R help - Nov 2001 - Changing strip widths in lattice plots

Hello R users,

I'm using xyplot (lattice) to plot some data. Unfortunately, the text that
goes
into each strip is often too big to fit. For instance, one of the factors may 
be labelled "Satisfaction with waiting time" which is too wide to fit.
If I use
split.string() to wrap it onto two lines it is then too high to fit in the 
strip. I'd prefer to apply split.string on the fly than manually shorten
each
offending label.

I thought I could try
   1. making the strip wider (in the y direction) or
   2. removing it altogether and adding the strip text with ltext()

strip.default seemed a good place to look. I commented out any rect() 
statements, but the strips were still drawn. Could someone please tell me where 
to look for adjusting the strip width (or removing it entirely).

Thank you very much for your help!


Regards,


Andrew C. Ward

CAPE Centre
Department of Chemical Engineering
The University of Queensland
Brisbane Qld 4072 Australia
andreww at cheque.uq.edu.au
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--- "Andrew C. Ward" <s195404 at student.uq.edu.au>
wrote:
> Hello R users,
> 
> I'm using xyplot (lattice) to plot some data.
> Unfortunately, the text that goes 
> into each strip is often too big to fit. For
> instance, one of the factors may 
> be labelled "Satisfaction with waiting time" which
> is too wide to fit. If I use 
> split.string() to wrap it onto two lines it is then
> too high to fit in the 
> strip. I'd prefer to apply split.string on the fly
> than manually shorten each 
> offending label.
> 
> I thought I could try
>    1. making the strip wider (in the y direction) or
>    2. removing it altogether and adding the strip
> text with ltext()
> 
> strip.default seemed a good place to look. I
> commented out any rect() 
> statements, but the strips were still drawn. Could
> someone please tell me where 
> to look for adjusting the strip width (or removing
> it entirely).

The strip can be removed by calling xyplot with strip=F. To increase its
height (to double the current height, say),  you would have to change the
print.trellis function. In "print.trellis.R" in the package source,
change

for(crr in 1:number.of.cond)
   heights.x[number.of.cond + 4 + (1:rows.per.page - 1)*(number.of.cond+3) -crr]
<-
       if (is.logical(x$strip)) 0  # which means strip = F, strips not to be
drawn
       else x$par.strip.text$cex

(lines 865-868) to

for(crr in 1:number.of.cond)
   heights.x[number.of.cond + 4 + (1:rows.per.page - 1)*(number.of.cond+3) -crr]
<-
       if (is.logical(x$strip)) 0  # which means strip = F, strips not to be
drawn
       else 2 * x$par.strip.text$cex


Hope that gives what you want.

- Deepayan

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