[R] Re: none
Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Sun Feb 27 12:51:14 CET 2000
Faheem Mitha <faheem at email.unc.edu> writes:
> Error in barplot.default(table(x), axisnames = axisnames, ...) : `height'
> must be a vector or a matrix
> pollf.df <- data.frame(hosp,sf,pollutf)
> # trying to get plot.factor to do its stuff. Fails with error message
> # quoted above.
> postscript("poll.anova1.ps",width=5.5, height = 5, horizontal=F, pointsize=8)
Well, plot.factor() is a method for the generic function plot() when
the argument is a factor, passing it anything but a factor is asking
What will happen is that it will do table(pollf.df) and try to barplot
that, but table() on a data frame with three variables is a three way
array and barplot() only knows what to do with 1-D or 2-D structures,
hence the error.
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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