Hello,
I am trying to use "bwplot" to display whisker boxes according to some conditioning
factors ("age" has two values 1/2). I get the following messages:
> library(trellis)
> bwplot(dvk95~age|site*season,panel=function(x,y){panel.bwplot(x,y)})
Error in tapply(1:0, structure(list(INDICES = numeric(0)), .Names = "INDICES"), :
arguments must have same length
In addition: Warning messages:
1: is.na() applied to non-(list or vector) in: is.na(x)
2: is.na() applied to non-(list or vector) in: is.na(x)
3: is.na() applied to non-(list or vector) in: is.na(x)
4: is.na() applied to non-(list or vector) in: is.na(x)
5: is.na() applied to non-(list or vector) in: is.na(x)
6: is.na() applied to non-(list or vector) in: is.na(x)
I suspect this may come from not-anwered (NA) combinations of categories (data are
field data on hazel grouse and the sampling is not balanced). Using "xyplot" however
leads to a correct display of data, the "NAs" combinations of categories being simply
empty in the panel plot.
Passing na.action = na.omit or similar expressions don't lead to anything (actually
every vector used has not any NA values).
Is there a way to get a display with bwplot (and panel.bwplot) in this case?
Thanks in advance for any hint,
Kind regards,
Patrick Giraudoux
University of Franche-Comt�
Department of Environmental Biology
EA3184 af. INRA
F-25030 Besan�on Cedex
tel.: +33 381 665 745
fax.: +33 381 665 797
http://lbe.univ-fcomte.fr
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