Dear R-core team,
I came across the following bug (feature?):
Modyfying example from help(na.omit):> ( m<-matrix(c(1, 2, 3, 0, 10, NA),ncol=2) )
[,1] [,2]
[1,] 1 0
[2,] 2 10
[3,] 3 NA> ( mo<- na.omit(m) )
[,1] [,2]
attr(,"na.action")
[1] 1
attr(,"na.action")attr(,"class")
[1] "omit" > dim(mo)
[1] 0 2 > is.matrix(mo)
[1] TRUE
So the result is an empty matrix! On the other hand > na.omit(as.data.frame(m))
V1 V2
1 1 0
2 2 10
works fine. help(na.omit) does not say that matrix is not a valid argument. At
least in na.omit in Splus it is valid.
I have tested this in R-1.0.0 and development version R-1.1 under LINUX,
Solaris and MSWindows.
Best wishes,
Sergei
================================================================
Dr. Sergei ZUYEV
Statistics and Modelling Science dept., University of Strathclyde
Livingston Tower, 26 Richmond str., Glasgow, G1 1XH, U.K.
Tel.: +44 (0)141 548 3663 Fax: +44 (0)141 552 2079
E-mail: sergei@stams.strath.ac.uk http://www.stams.strath.ac.uk
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