The default method for prcomp does not have an na.action argument:
Usage:
prcomp(x, ...)
## S3 method for class 'formula':
prcomp(formula, data = NULL, subset, na.action, ...)
## Default S3 method:
prcomp(x, retx = TRUE, center = TRUE, scale. = FALSE, tol = NULL, ...)
so this is as documented. In general only formula-based interfaces do
have subset and na.action.
On Fri, 16 Jun 2006, [EMAIL PROTECTED] wrote:
> The following seems to be an bug in prcomp():
>
> > test <- ts( matrix( c(NA, 2:5, NA, 7:10), 5, 2))
> > test
> Time Series:
> Start = 1
> End = 5
> Frequency = 1
> Series 1 Series 2
> 1 NA NA
> 2 2 7
> 3 3 8
> 4 4 9
> 5 5 10
> > prcomp(test, scale.=TRUE, na.action=na.omit)
> Erro en svd(x, nu = 0) : infinite or missing values in 'x'
> > prcomp(na.omit(test), scale.=TRUE, na.action=na.omit)
> Standard deviations:
> [1] 1.414214e+00 3.726778e-17
>
> Rotation:
> PC1 PC2
> Series 1 0.7071068 -0.7071068
> Series 2 0.7071068 0.7071068
> >
> note that
> > is.matrix(test)
> [1] TRUE
>
> This is R2.3.1 pre-compiled binary from CRAN on windows XP.
>
> > sessionInfo()
> Version 2.3.1 (2006-06-01)
> i386-pc-mingw32
>
> attached base packages:
> [1] "methods" "stats" "graphics" "grDevices" "utils"
> "datasets" "base"
>
>
> Kjetil
>
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
>
--
Brian D. Ripley, [EMAIL PROTECTED]
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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