Hi,
Any reason these should be different?
x=matrix(0, nr=0, nc=3)
colnames(x) = letters[1:3]
data.frame(x)
#[1] a b c
#<0 rows> (or 0-length row.names)
y=vector("list", length=3)
names(y) = letters[1:3]
data.frame(y)
#NULL data frame with 0 rows
both should have names (the second one does not) and why print something
different for y?
The two of the last three examples refer to a "NULL data frame", eg
(d00 <- d0[FALSE,]) # NULL data frame with 0 rows
but there is no description of what a NULL data frame should be (zero
rows or zero columns, or either or both - and why a special name?)
best wishes
Robert
--
Robert Gentleman, PhD
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M2-B876
PO Box 19024
Seattle, Washington 98109-1024
206-667-7700
rgentlem at fhcrc.org