[R] Difference of array and vector

[Farrel Buchinsky]

I had had problems getting my head around what an array was as opposed to a 
data frame and where vectors fitted into the two.
I found a useful URL on the same website eluded to below.
http://www.burns-stat.com/pages/Tutor/unwilling_S.pdf
Go to the heading "The Look and Feel of Objects"

Farrel

"Michael Kubovy" <kubovy at virginia.edu> wrote in message 
news:E770E5A1-053B-4FB3-B290-B984350536C0 at virginia.edu...
> # Here's a vector:
> letv <- letters
> is.vector(letv)
>
> # Here's an array:
> leta <- as.array(letters)
> is.array(leta)
> attributes(letv)
> attributes(leta)
>
> To understand the importance of attributes:
> http://www.burns-stat.com/pages/Spoetry/essentials.pdf
> There Burns writes (p. 3):
> "An S array is merely a vector that has a dim attribute, and
> optionally a dimnames attribute."
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