Dear R users,
Here is my problem:
I have an array with at least four dimensions:
> dim(myArray)
[1] 20 17 3 6
I'd like to apply a function to each occurrence of the matrix (3x6)
defined by the last two dimensions. This interpolation function always
return a matrix of the same dimensions as its argument:
> interpSecteurs.f(myArray[1, 1, , ])
secteur
rotation 1 2 3 4 5 6
1 3 5.25 10 6 6 3
2 3 10.00 10 7 7 3
3 3 0.50 10 8 8 3
But when applying this function with apply, these matrices are coerced
in vectors of length 18:
> test <- apply(myArray,
+ c(1, 2),
+ interpSecteurs.f)
> dim(test)
[1] 18 20 17
I read in the help that this is the normal behaviour in apply.
However, I really need to keep the same dimension as the input data.
Do you know any function or method which allows bypassing this behaviour ?
(unfortunately my function seems not suitable for a vectorization using
sweep)
Alternatively, a method to recover the wished array dimensions afterward
would be also acceptable.
Many thanks in advance.
Yves
--
---------------------------------------------------
Yves REECHT
Dpt STH (Sciences et Technologies Halieutiques)
IFREMER, BP 70
29280 PLOUZANE
FRANCE
tel. +33 (0)2 98 22 43 69
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