[R] Converting data frame into multidimensional array

[Gabor Grothendieck]

On Fri, Oct 21, 2011 at 7:04 PM, Gabor Grothendieck
<ggrothendieck at gmail.com> wrote:
> On Fri, Oct 21, 2011 at 4:15 PM, Luk Arbuckle <luk.arbuckle at gmail.com> 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 be converted into an array of dimensions
>> c(4,2,2,2) in this case, not a table.
>>
>
> Try this:
>
> xtabs(Freq ~., X)
>

By the way, you asked for an array rather than a table but a table is an array:

is.array(xtabs(Freq ~., X)) # TRUE


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