[R] lattice: drawing strips for single-panel plots

[Dieter Menne]

John G. Bullock-2 wrote:
> 
> The strip argument to panel.xyplot seems to be ignored for single-panel 
> plots.  Here is an example:
> 
>    data(Chem97, package = "mlmRev")
>    myStrip <- function(...) { ltext(.5, .5, 'strip text') }
>    densityplot(~ gcsescore, data = Chem97, strip=myStrip)
> 
> The figure is printed with no strip. 
> 

The workaround is to give it a one-level factor:

library(lattice)
data(Chem97, package = "mlmRev")
Chem97$what = as.factor("strip text")
densityplot(~ gcsescore|what, data = Chem97)


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