[R] na.rm = T treatment by ggplot2's geom_bar

[Dimitri Liakhovitski]

Тhanks for the advice, Jeff. Will keep it in mind.
But I am anal - I shy away from using letters and words that "look
familiar" to me in R (such as mean, sd, T, etc.)
But still, it's a good advice.

On Thu, Jul 27, 2017 at 11:53 AM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us>
wrote:

> I think you should be more suspicious of yourself, Dimitri. A letter T
> variable can easily arise in the problem domain when you are not thinking
> of logical values at all, at which point your cavalier use of T as a
> synonym for TRUE can suddenly become a bug.
> --
> Sent from my phone. Please excuse my brevity.
>
> On July 27, 2017 8:18:03 AM PDT, Dimitri Liakhovitski <
> dimitri.liakhovitski at gmail.com> wrote:
> >Thank you, Bert!
> >
> >I do NOT have an object named "T" in scope (I checked - and besides, it
> >would never occur to me to use this name).
> >TRUE or T results in the same unexpected behavior:
> >
> >ggplot(data = md, mapping = aes(x = a)) +
> >  geom_bar(na.rm = TRUE)
> >
> >
> >
> >On Thu, Jul 27, 2017 at 10:57 AM, Bert Gunter <bgunter.4567 at gmail.com>
> >wrote:
> >
> >> Just a thought:
> >>
> >> Did you try na.rm = TRUE  in case you have an object named "T" in
> >scope?
> >>
> >> -- Bert
> >>
> >>
> >> Bert Gunter
> >>
> >> "The trouble with having an open mind is that people keep coming
> >along
> >> and sticking things into it."
> >> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
> >>
> >>
> >> On Thu, Jul 27, 2017 at 7:49 AM, Dimitri Liakhovitski
> >> <dimitri.liakhovitski at gmail.com> wrote:
> >> > To clarify: my question is not about "who could I exclude NAs from
> >being
> >> > counted" - I know how to do that.
> >> > My question is: Why na.rm = T is not working for geom_bar in this
> >case?
> >> >
> >> > On Thu, Jul 27, 2017 at 8:24 AM, Dimitri Liakhovitski <
> >> > dimitri.liakhovitski at gmail.com> wrote:
> >> >
> >> >> Hello!
> >> >>
> >> >> I am trying to understand how ggplot2's geom_bar treats NAs.
> >> >> The help file says:
> >> >>
> >> >> library(ggplot2)
> >> >> ?geom_bar
> >> >> na.rm: If FALSE, the default, missing values are removed with a
> >warning.
> >> >> If TRUE, missing values are silently removed.
> >> >>
> >> >> I am trying it out:
> >> >> md <- data.frame(a = c(letters[1:5], letters[1:4], letters[1:3],
> >rep(NA,
> >> >> 3)))
> >> >> str(md); levels(md$a)
> >> >>
> >> >> ggplot(data = md, mapping = aes(x = a)) +
> >> >>   geom_bar(na.rm = F)
> >> >> It runs without warnings and generates counts for each factor
> >level AS
> >> >> WELL AS the NAs. Makes sense.
> >> >>
> >> >> Now, I don't want the NAs to be counted. So, I run:
> >> >> ggplot(data = md, mapping = aes(x = a)) +
> >> >>   geom_bar(na.rm = T)
> >> >>
> >> >> But I still have NAs in the picture. Why?
> >> >> What am I missing?
> >> >>
> >> >> Thank you!
> >> >> --
> >> >> Dimitri Liakhovitski
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Dimitri Liakhovitski
> >> >
> >> >         [[alternative HTML version deleted]]
> >> >
> >> > ______________________________________________
> >> > R-help at 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.
> >>
>



-- 
Dimitri Liakhovitski

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