Apologies, disregard my former message! I overlloked the requirement
that only combinations
present in the data must be taken. ft.
--
Fernando TUSELLe-mail:
Departamento de EconometrÃa y EstadÃstica [EMAIL PROTECTED]
Facultad de CC.EE. y Empresariales
Hi, Ted:
Probably not the most elegant way, but not too tedious either.
>a <- as.factor(c("A0","A1","A2"))
>b <- as.factor(c("B0","B1","B2"))
> as.vector(outer(a,b,FUN=paste,sep=""))
[1] "A0B0" "A1B0" "A2B0" "A0B1" "A1B1" "A2B1" "A0B2" "A1B2" "A2B2"
Best, ft.
--
Fernando TUSELL
On 15-Jun-04 Peter Dalgaard wrote:
> (Ted Harding) <[EMAIL PROTECTED]> writes:
>
> ...
>> then I'd like to end up with a single factor with levels
>>
>> A0B0, A0B1, A0B2, A1B0, A1B1, A1B2
>>
>> according to all the combinations which actually occur in the
>> data (e.g. if (A1,B2) did not occur
-- Original Message -
From: "Ted Harding" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, June 15, 2004 10:26 AM
Subject: [R] "Glueing" factors together
> Hi folks,
>
> Suppose I have a series of cases each with categorical
> factors A
(Ted Harding) <[EMAIL PROTECTED]> writes:
...
> then I'd like to end up with a single factor with levels
>
> A0B0, A0B1, A0B2, A1B0, A1B1, A1B2
>
> according to all the combinations which actually occur in the
> data (e.g. if (A1,B2) did not occur in the data, then A1B2 would
> not be a level
Hi folks,
Suppose I have a series of cases each with categorical
factors A, B.
What is the best way to "glue" A and B together into a single
factor? For example, given
A0 B1 ...
A1 B1 ...
A0 B2 ...
A1 B0 ...
A0 B0 ...
A1 B2 ...
then I'd like to end up with a single factor with levels
A0B0, A
