Re: [R] Keyboard Input

From: Jonathan P Daily <jdaily_at_usgs.gov>
Date: Tue, 15 Mar 2011 10:29:02 -0400

I apologize for being unclear in my original post. What I am trying to achieve is to capture the stdin() connection and read in a single keystroke - including arrow keys and the like - without having to have to use the return key each time. My goal is to create a small UI for rapidly looking through the results of a large simulation. As I think about it more, though, it is probably going to be easier to dump the data into files and look through it outside of R.

Thanks anyways,

Jon



Jonathan P. Daily
Technician - USGS Leetown Science Center 11649 Leetown Road
Kearneysville WV, 25430
(304) 724-4480
"Is the room still a room when its empty? Does the room,  the thing itself have purpose? Or do we, what's the word... imbue it."

Bert Gunter <gunter.berton_at_gene.com> wrote on 03/15/2011 10:08:51 AM:

> [image removed]
>
> Re: [R] (no subject)
>
> Bert Gunter
>
> to:
>
> Jonathan P Daily
>
> 03/15/2011 10:08 AM
>
> Cc:
>
> r-help
>
> ?strsplit
>
> x <- "ThisIsaString"
> y<- strsplit(x,"")
>
> This gives a list, which you can convert to a vector by unlist(y)
>
> Incidentally, you could have found out about strsplit via R's
> help.search("character string") (or similar) or even googling "R
> string function" . Please use R's native Help capabilities before
> posting to the list.
>
> (I will grant that the unlist() trick may not be that easy to find).
>
> Also, it's often worthwhile searching the Help archives first. Peter
> Dalgaard answered this same question here a day or two ago.
>
> Cheers,
> Bert
>
>
>
> On Tue, Mar 15, 2011 at 6:35 AM, Jonathan P Daily <jdaily_at_usgs.gov>
wrote:
> > I was wondering if there is a way to get read in a single keystroke at
a
> > time in R as a string, akin to ncurses-style interfaces. I looked into
> > readLines, readChar, etc. using stdin, but these all require the use
of an
> > end of line. Has anyone ever had need to do this or have any ideas on
how
> > to do this?
> >
> > Thanks,
> > Jon
> >
> > PS I apologize if this double-sends, but I am having mail client
issues.
> > --------------------------------------
> > Jonathan P. Daily
> > Technician - USGS Leetown Science Center
> > 11649 Leetown Road
> > Kearneysville WV, 25430
> > (304) 724-4480
> > "Is the room still a room when its empty? Does the room,
> > the thing itself have purpose? Or do we, what's the word... imbue
it."
> > - Jubal Early, Firefly
> >
> > ______________________________________________
> > R-help_at_r-project.org mailing list
> > 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.
> >
>
>
>
> --
> Bert Gunter
> Genentech Nonclinical Biostatistics



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