Hi,
In man page for duplicated:
Value:
‘duplicated()’: For a vector input, a logical vector of the same
length as ‘x’. For a data frame, a logical vector with one
element for each row. For a matrix or array, a logical array with
the same dimensions and dimnames.
When 'x' is a matrix or array, the returned value is NOT a logical
array:
> m <- matrix(c(3,2,7,6,2,7), nrow=3)
> m
[,1] [,2]
[1,] 3 6
[2,] 2 2
[3,] 7 7
> duplicated(m)
[1] FALSE FALSE FALSE
Only if MARGIN=0 it seems:
> duplicated(m, MARGIN=0)
[,1] [,2]
[1,] FALSE FALSE
[2,] FALSE TRUE
[3,] FALSE TRUE
Also, any reason why this doesn't work?
> anyDuplicated(m, MARGIN=0)
Error in dim(newX) <- c(prod(d.call), d2) :
dims [product 1] do not match the length of object [6]
May be it could be equivalent to:
> anyDuplicated(as.vector(m))
[1] 5
Thanks,
H.
--
Hervé Pagès
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M1-B514
P.O. Box 19024
Seattle, WA 98109-1024
E-mail: hpa...@fhcrc.org
Phone: (206) 667-5791
Fax: (206) 667-1319
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