Gabor Grothendieck wrote:
michael watson (IAH-C bbsrc.ac.uk> writes:
:
: Hi
:
: I'm seeing some "odd" behaviour with cbind(). My code is:
:
: > cat <- read.table("cogs_category.txt", sep="\t", header=TRUE,
: quote=NULL, colClasses="character")
: > colnames(cat)
: [1] "Code""Description
michael watson (IAH-C bbsrc.ac.uk> writes:
:
: Hi
:
: I'm seeing some "odd" behaviour with cbind(). My code is:
:
: > cat <- read.table("cogs_category.txt", sep="\t", header=TRUE,
: quote=NULL, colClasses="character")
: > colnames(cat)
: [1] "Code""Description"
: > is.factor(cat$Code)
Probably you called the build-in rainwbow-function, which returns a string.
>str(rainbow(10))
chr "FF"
Dieter Menne
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This is of the nature of an FAQ. Data frames coerce character
vectors into factors. If you want a character vector to stay
that way (and not become a factor) wrap in up in ``I()'':
cat <- cbind(cat,Color=I(rainbow(nrow(cat
(There's no need to quote the name ``Color'' in the foregoi
cat is a data.frame,
so cbind is use for a data.frame
and
?data.frame tell us that:
Character variables passed to 'data.frame' are converted
to factor columns unless protected by 'I'.
PS : it is not good ides to call your data.frame cat as there is a cat
function.
At 09:19 10/12/2004, mich
