[R] [External] Re: [External] Adding a superscript 6 to a number

[Bert Gunter]

... yes, more specifically:

(from ?paste)
"paste converts its arguments (*via* as.character
<http://127.0.0.1:33923/help/library/base/help/as.character>) to character
strings, and concatenates them (separating them by the string given by sep).
"

More to the point, I would say, is that if you need to manipulate
expressions or other language objects you should live in the world of
language objects, rather than converting them back and forth to character
strings.  But this may be off topic and in the weeds;  for which, if so,
apologies.

Cheers,
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 Tue, Dec 29, 2020 at 2:57 PM Richard M. Heiberger <rmh using temple.edu> wrote:

> It is a generalization.
> Don't use paste() and expression() together because paste is a sort-of
> inverse to expression.
> In this example I start by typing several characters, and the result
> of paste(expression()) is a string containing the characters I
> initially typed.
>
> > expression(12^6)
> expression(12^6)
> > paste(expression(12^6))
> [1] "12^6"
>
>
> expression(12^6)
> paste(expression(12^6))
>
> plot(0:1, 0:1)
> text(.1, .4, labels=paste(expression(12^6)))
> text(.1, .3, labels=expression(12^6))
>
> On Tue, Dec 29, 2020 at 4:15 PM Jeff Newmiller <jdnewmil using dcn.davis.ca.us>
> wrote:
> >
> > Why not? Is that a generalization, or specific to this case?
> >
> > On December 29, 2020 7:54:22 AM PST, "Richard M. Heiberger" <
> rmh using temple.edu> wrote:
> > >paste() is the problem.  don’t use paste with expression()
> > >
> > >On Tue, Dec 29, 2020 at 10:50 Sorkin, John <jsorkin using som.umaryland.edu>
> > >wrote:
> > >
> > >> Colleagues,
> > >>
> > >> I would like to create a number (stored in the variable x) to the
> > >number
> > >> with the exponent of, i.e. the number to the sixth power. The code I
> > >have
> > >> tried, pasted below does not work.
> > >>
> > >> # create plot
> > >> plot(x=0.2,y=0.2,xlim=c(0,1),ylim=c(0,1))
> > >> PNotSusp=0.69
> > >> # Create a string containing the base and exponent.
> > >> x <- 0.95123
> > >> # Convert the base to text and add the exponent of 6
> > >> mylab <- expression(paste(" ",character(x)^6))
> > >> # Add the text to the plot
> > >> text(0.4,0.8,labels=paste(PNotSusp,"=\n",mylab))
> > >>
> > >> I hope someone can show me how to create the text string I need.
> > >>
> > >> Thank you,
> > >> John
> > >>
> > >> John David Sorkin M.D., Ph.D.
> > >> Professor of Medicine
> > >> Chief, Biostatistics and Informatics
> > >> University of Maryland School of Medicine Division of Gerontology and
> > >> Geriatric Medicine
> > >> Baltimore VA Medical Center
> > >> 10 North Greene Street
> > >>
> > ><
> https://www.google.com/maps/search/10+North+Greene+Street?entry=gmail&source=g
> >
> > >> GRECC (BT/18/GR)
> > >> Baltimore, MD 21201-1524
> > >> (Phone) 410-605-7119
> > >> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
> > >>
> > >>
> > >> ______________________________________________
> > >> R-help using 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.
> > >>
> > >
> > >       [[alternative HTML version deleted]]
> > >
> > >______________________________________________
> > >R-help using 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.
> >
> > --
> > Sent from my phone. Please excuse my brevity.
>
> ______________________________________________
> R-help using 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.
>

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