On 20/12/2021 11:41 p.m., Marc Girondot via R-help wrote:
Dear members,
I work about dosage and some values are bellow the detection limit. I
would like create new "numbers" like LDL (to represent lower than
detection limit) and UDL (upper the detection limit) that behave like
NA, with the possibility to test them using for example is.LDL() or
is.UDL().
Note that NA is not the same than LDL or UDL: NA represent missing data.
Here the data is available as LDL or UDL.
NA is built in R language very deep... any option to create new version
of NA-equivalent ?
There was a discussion of this back in May. Here's a link to one
approach that I suggested:
https://stat.ethz.ch/pipermail/r-devel/2021-May/080776.html
Read the followup messages, I made at least one suggested improvement.
I don't know if anyone has packaged this, but there's a later version of
the code here:
https://stackoverflow.com/a/69179441/2554330
Duncan Murdoch
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
