t Hannah; r-help@r-project.org
> Subject: Re: [R] meaning of asymmetric on help page for intersect
>
> There is also a symmetric set difference = union(setdiff(x,
> y), setdiff(y, x)) denoted x \Delta y
>
> -- David
>
>
> -Original Message-
> From: r-help-b
Hello,
The symmetric set difference of A and B is the set of elements in A or B
but not in A intersection B, i.e., ( (A U B) \ (A intersection B) ).
The asymmetric set difference of A and B is the set of elements of A
except those in B, i.e., (A \ B).
Best regards,
Carlos J. Gil Bellosta
http:/
On 1/13/2009 10:41 AM, Juliet Hannah wrote:
Sorry if this is a silly question. What does asymmetric refer to from
?intersect, and are there any
aspects of the result that may be different from expected (reason for
exclamation point) ?
There are two definitions for a set difference: the symmetr
-project.org
Subject: [R] meaning of asymmetric on help page for intersect
Sorry if this is a silly question. What does asymmetric refer to from
?intersect, and are there any
aspects of the result that may be different from expected (reason for
exclamation point) ?
As toy data, if needed, here are the
Because there is also a symmetric difference: see
http://en.wikipedia.org/wiki/Symmetric_difference
Sorry if this is a silly question. What does asymmetric refer to from
?intersect, and are there any
aspects of the result that may be different from expected (reason for
exclamation point) ?
As
Sorry if this is a silly question. What does asymmetric refer to from
?intersect, and are there any
aspects of the result that may be different from expected (reason for
exclamation point) ?
As toy data, if needed, here are the examples from the help page.
(x <- c(sort(sample(1:20, 9)),NA))
(y <-
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