R help - Sep 2007 - [Lattice] Incrase the height of strips in Trellis plots

Dear all,

I wonder how to increase the height of strips via strip.default or
strip.custom. The following example hopefully illustrates the difficulty
I am facing:

library(lattice)
xyplot(Petal.Length ~ Petal.Width | Species, iris,
        strip = strip.custom(par.strip.text = list(cex = 2)))

Thanks for any advice,

Bernd

> version
               _
platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status
major          2
minor          5.1
year           2007
month          06
day            27
svn rev        42083
language       R
version.string R version 2.5.1 (2007-06-27)

This should give you something close to what you want:


xyplot(Petal.Length ~ Petal.Width | Species, iris,
       strip = strip.custom(par.strip.text = list(cex = 2)),
       par.settings = list(layout.heights=list(strip=1.45)))

The par.settings argument alters locally the default par settings of lattice
plots, see e.g. ?trellis.par.get and the ?xyplot about the par.settings
argument.

A closer inspection (try using strip = 2 or numbers less than 1.45 in stead of
strip = 1.45) of the figure reveals that there are some problems with vertical
alignment of the strip text, i.e. not centered.

To remedy this I think that you have to use you own strip function. You may be
able to build you own function by altering the default strip function, see
?lattice.options and try lattice.options() at the command prompt. However this
may be more difficult than it seems at first. Perhaps some one more familiar
with the lattice package can solve this.
 

Best regards

Frede Aakmann T?gersen
Scientist


UNIVERSITY OF AARHUS
Faculty of Agricultural Sciences
Dept. of Genetics and Biotechnology
Blichers All? 20, P.O. BOX 50
DK-8830 Tjele

Phone:   +45 8999 1900
Direct:  +45 8999 1878

E-mail:  FredeA.Togersen at agrsci.dk
Web:	   http://www.agrsci.org				

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> -----Oprindelig meddelelse-----
> Fra: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] P? vegne af Bernd Weiss
> Sendt: 5. september 2007 06:48
> Til: r-help at stat.math.ethz.ch
> Emne: [R] [Lattice] Incrase the height of strips in Trellis plots
> 
> Dear all,
> 
> I wonder how to increase the height of strips via 
> strip.default or strip.custom. The following example 
> hopefully illustrates the difficulty I am facing:
> 
> library(lattice)
> xyplot(Petal.Length ~ Petal.Width | Species, iris,
>         strip = strip.custom(par.strip.text = list(cex = 2)))
> 
> Thanks for any advice,
> 
> Bernd
> 
> 
> > version
>                _
> platform       i386-pc-mingw32
> arch           i386
> os             mingw32
> system         i386, mingw32
> status
> major          2
> minor          5.1
> year           2007
> month          06
> day            27
> svn rev        42083
> language       R
> version.string R version 2.5.1 (2007-06-27)
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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Frede Aakmann T?gersen schrieb:
> This should give you something close to what you want:
> 
> 
> xyplot(Petal.Length ~ Petal.Width | Species, iris,
>        strip = strip.custom(par.strip.text = list(cex = 2)),
>        par.settings = list(layout.heights=list(strip=1.45)))
> 
> The par.settings argument alters locally the default par settings of
lattice plots, see e.g. ?trellis.par.get and the ?xyplot about the par.settings
argument.
> 
> A closer inspection (try using strip = 2 or numbers less than 1.45 in stead
of strip = 1.45) of the figure reveals that there are some problems with
vertical alignment of the strip text, i.e. not centered.
> 
> To remedy this I think that you have to use you own strip function. You may
be able to build you own function by altering the default strip function, see
?lattice.options and try lattice.options() at the command prompt. However this
may be more difficult than it seems at first. Perhaps some one more familiar
with the lattice package can solve this.

Perfect! Thank you very much,

Bernd


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On 9/5/07, Frede Aakmann T?gersen <FredeA.Togersen at agrsci.dk>
wrote:
> This should give you something close to what you want:
>
>
> xyplot(Petal.Length ~ Petal.Width | Species, iris,
>        strip = strip.custom(par.strip.text = list(cex = 2)),
>        par.settings = list(layout.heights=list(strip=1.45)))
>
> The par.settings argument alters locally the default par settings of
lattice
> plots, see e.g. ?trellis.par.get and the ?xyplot about the par.settings
> argument.
Another possibility that predates par.settings (but is basically equivalent) is

xyplot(Petal.Length ~ Petal.Width | Species, iris,
       par.strip.text = list(lines = 2, cex = 2))

-Deepayan