On 2/3/2010 7:48 AM, Brian Diggs wrote:
> On 2/1/2010 3:57 PM, Brian Diggs wrote:
>> The following code:
>>
>> cut(as.POSIXct("2009-11-01 04:00:00", tz="America/Los_Angeles"), "1 day")
>>
>> gives the error:
>>
>> Error in seq.int(0, to - from, by) : 'to' must be finite
[details deleted...]
>> Is
A search for "c.factor" returns tons of hits on this topic.
Heres just one of the hits from 2006, when I asked the same question :
http://tolstoy.newcastle.edu.au/R/e2/devel/06/11/1137.html
So it appears to be complicated and there are good reasons.
Since I needed it, I created c.factor in data.
On Thu, Feb 4, 2010 at 10:45 AM, Patrick Burns wrote:
> The argument I have in 'The R Inferno'
> is that how you want to combine factors
> may differ from someone else's desires.
>
> There are lots of tricky questions:
> What about ordered factors?
> What if the ordered levels are different in
> d
> I'd propose the following: If the sets of levels of all arguments are the
> same, then c.factor() would return a factor with the common set of levels;
> if the sets of levels differ, then, as Hadley suggests, the level-set of the
> result would be the union of sets of levels of the arguments, but
The argument I have in 'The R Inferno'
is that how you want to combine factors
may differ from someone else's desires.
There are lots of tricky questions:
What about ordered factors?
What if the ordered levels are different in
different objects?
...
Pat
On 04/02/2010 15:53, Hadley Wickham wrot
Dear Thomas and Hadley,
I'd propose the following: If the sets of levels of all arguments are the
same, then c.factor() would return a factor with the common set of levels;
if the sets of levels differ, then, as Hadley suggests, the level-set of the
result would be the union of sets of levels of t
On Thu, 4 Feb 2010, Hadley Wickham wrote:
Hi all,
Is there are reason that there is no c.factor method? Analogous to
c.Date, I'd expect something like the following to be useful:
c.factor <- function(...) {
factors <- list(...)
levels <- unique(unlist(lapply(factors, levels)))
char <- unli
On Thu, 4 Feb 2010, Barry Rowlingson wrote:
On Wed, Feb 3, 2010 at 10:40 AM, Johannes Graumann
wrote:
Hello,
I would like to organize the "R" directory in my home-grown package into
sub-directories, but "R CMD --build" doesn't seem to find *.R files below
the actual source directory. Is there
Hi all,
Is there are reason that there is no c.factor method? Analogous to
c.Date, I'd expect something like the following to be useful:
c.factor <- function(...) {
factors <- list(...)
levels <- unique(unlist(lapply(factors, levels)))
char <- unlist(lapply(factors, as.character))
facto
On Wed, Feb 3, 2010 at 10:40 AM, Johannes Graumann
wrote:
> Hello,
>
> I would like to organize the "R" directory in my home-grown package into
> sub-directories, but "R CMD --build" doesn't seem to find *.R files below
> the actual source directory. Is there any way around that?
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