Problem with 'drop' for 1-D arrays? (PR#4110)

R 1.7.1 on Windows XP

The argument 'drop' appears to be ignored when subscripting
1-dimensional arrays (i.e., arrays whose 'dim' attribute has 
length 1):

x <- array(1:5, dim=c(5))
dim(x)

[1] 5

dim(x[, drop=TRUE])   # Shouldn't this be NULL?

[1] 5

dim(x[2:3])  # This seems right:  default is drop=TRUE

NULL

dim(x[2:3, drop=FALSE])  # But this seems wrong

NULL

Note that the behavior with a 2-D array is different:

y <- array(1:5, dim=c(1,5))
dim(y)

[1] 1 5

dim(y[,,drop=TRUE])

NULL

dim(y[,2:3])

NULL

dim(y[,2:3,drop=FALSE])

[1] 1 2

Rich Raubertas
Biometrics Research, RY33-300
Merck & Co.

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