[R] by/ NA/ barplot
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Wed Jul 4 08:40:22 CEST 2001
On Wed, 4 Jul 2001, S.McClatchie wrote:
> I have generated an object (class = by) with NA values and want to plot
> the output as a bargraph:
> x2 <- by(scl.nos, species, sum)
> These data are summed counts of fish by species
> When I try to plot them I get an error due to the NA values, I think:
> > barplot(x2,
> + xlab='fish length (SL or TL) cm',
> + ylab='individuals per nm towed', col='black')
> Error in plot.window(xlim, ylim, log, asp, ...) :
> need finite ylim values
> Plot.table gives me the same error and I tried na.rm=TRUE to no effect.
> Is this simple to solve? I guess I need to replace the NAs with zeros in
> one of the by attributes?
barplot does not accept NAs. That's a bug, I believe. It will work if you
specify ylim, as in (modifying the first exammple)
tN <- table(Ni <- rpois(100, lambda=5))
tN <- NA
r <- barplot(tN, col='gray')
Error in plot.window(xlim, ylim, log, asp, ...) :
need finite ylim values
r <- barplot(tN, col='gray', ylim=c(0,25)) # works.
I assume you want the bar omitted in the NA cases.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
More information about the R-help