Thank-you for the replies. I would say that the function xtabs() is
the simplest method. And thanks for pointing out that a table is also
an array, as I clearly wasn't aware of that.
On 2011-10-21, at 19:07, Gabor Grothendieck wrote:
> On Fri, Oct 21, 2011 at 7:04 PM, Gabor Grothendieck
> wrot
On Fri, Oct 21, 2011 at 7:04 PM, Gabor Grothendieck
wrote:
> On Fri, Oct 21, 2011 at 4:15 PM, Luk Arbuckle wrote:
>> Consider the following data frame
>>
>> X <- data.frame(Titanic)
>>
>> Does anyone know of an easy way to convert X into a multidimensional
>> array? Example that doesn't work
>>
On Fri, Oct 21, 2011 at 4:15 PM, Luk Arbuckle wrote:
> Consider the following data frame
>
> X <- data.frame(Titanic)
>
> Does anyone know of an easy way to convert X into a multidimensional
> array? Example that doesn't work
>
> X <- as.array(X, dim=c(4,2,2,2))
>
> To do what I need, X needs to
You are probably looking for the structable and related functions in the vcd
package.
Be sure to read the vignettes
library(vcd)
X <- data.frame(Titanic)
XS <- structable(~Class+Sex+Age+Survived, data=X)
as.table(XS)
is.array(XS)
Rich
On Fri, Oct 21, 2011 at 5:56 PM, Luk Arbuckle wrote:
> I nee
I need something that will work with any, possibly very large, data
frame. This dataset is only a very small example.
On 2011-10-21, at 17:31, David L Carlson wrote:
> How about?
>
>> x <- array(Titanic, dim=c(4,2,2,2))
>> str(x>
> num [1:4, 1:2, 1:2, 1:2] 0 0 35 0 0 0 17 0 118 154 ...
>
>
How about?
> x <- array(Titanic, dim=c(4,2,2,2))
> str(x>
num [1:4, 1:2, 1:2, 1:2] 0 0 35 0 0 0 17 0 118 154 ...
--
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77843-4352
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