Dear R-devel,
The median() function assigns a name, "NA", to its return value if the return
value is NA and the input vector has names, otherwise the names attribute is
NULL. This looks strange and inconsistent with the behavior of mean().
This inconsistency becomes a problem when median() is used inside user code
that relies on consistent naming convention.
Thanks,
Vadim
> foo <- c(x=as.numeric(NA), y=as.numeric(NA), z=as.numeric(NA))
> names(mean(foo))
NULL
> names(median(foo))
[1] NA
## no names in input
> foo <- rep(as.numeric(NA), 3)
> names(median(foo))
NULL
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 7.1
year 2008
month 06
day 23
svn rev 45970
language R
version.string R version 2.7.1 (2008-06-23)
>
Note: This email is for the confidential use of the named addressee(s) only and
may contain proprietary, confidential or privileged information. If you are not
the intended recipient, you are hereby notified that any review, dissemination
or copying of this email is strictly prohibited, and to please notify the
sender immediately and destroy this email and any attachments. Email
transmission cannot be guaranteed to be secure or error-free. Jump Trading,
therefore, does not make any guarantees as to the completeness or accuracy of
this email or any attachments. This email is for informational purposes only
and does not constitute a recommendation, offer, request or solicitation of any
kind to buy, sell, subscribe, redeem or perform any type of transaction of a
financial product.
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
