Thanks William !
file.info("E:/ home work/Rstudio/kim.jpeg")
size isdir mode mtime ctime atime
exe
E:/home work/Rstudio/kim.jpeg NA NA <NA> <NA> <NA> <NA> <NA>
So R thinks this file doesn't exist? But the file is already in "E:/ home
work/Rstudio" folder, I don't understand why file.info( ) returned such
message. I have multiple files in this directory "E:/home work/Rstudio",
but R shows:
file.info("E:/home work/Rstudio")
size isdir mode
mtime ctime atime exe
E:/home work/Rstudio 0 TRUE 777 2013-01-13 22:12:58 2013-01-13
20:57:36 2013-01-13 22:12:58 no
Any help ?
On Mon, Jan 14, 2013 at 11:44 AM, William Dunlap <wdun...@tibco.com> wrote:
> You can use file.info("myFile") to make sure the file exists and has
> appropriate permissions ("mode"
> in file.info's lingo, as in Unix). E.g.,
>
> > file.info("c:/temp/BO.jpeg") # this one does not exist
> size isdir mode mtime ctime atime exe
> c:/temp/BO.jpeg NA NA <NA> <NA> <NA> <NA> <NA>
> > file.info("c:/temp/BO.jpg") # this one exists
> size isdir mode mtime ctime
> atime
> c:/temp/BO.jpg 150536 FALSE 666 2013-01-14 08:35:32 2013-01-14 08:33:09
> 2013-01-14 08:33:09
> exe
> c:/temp/BO.jpg no
>
> I can readJPEG() the file with mode 666, but not all permission
> information is encoded in the mode.
>
> Bill Dunlap
> Spotfire, TIBCO Software
> wdunlap tibco.com
>
> > -----Original Message-----
> > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> On Behalf
> > Of Jeff Newmiller
> > Sent: Monday, January 14, 2013 8:25 AM
> > To: Yi Yuan; r-help@r-project.org
> > Subject: Re: [R] readJPEG function cannot open jpeg files
> >
> > Being unable to open a file is a related to your operating system and
> how R interacts with
> > that OS. If your interactive development environment (IDE, of which
> RStudio is an
> > example) is trying to make things simpler for you but you don't
> understand how to use it,
> > then you need to ask help from your RStudio support resources, not here.
> >
> > When posting here, you should mention your results from using base R
> functions like
> >
> > ?sessionInfo
> > ?getwd
> > ?list.files
> >
> > as indicated in the Posting Guide mentioned at the bottom of every
> R-help email.
> >
> > Consistent with the fact that this is an interface issue between R and
> the OS, sometimes
> > you will have to investigate the problem from outside R. For example,
> you might need to
> > investigate issues with security permissions that are OS specific and
> completely outside
> > the scope of this forum.
> >
> ---------------------------------------------------------------------------
> > Jeff Newmiller The ..... ..... Go
> Live...
> > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live
> Go...
> > Live: OO#.. Dead: OO#.. Playing
> > Research Engineer (Solar/Batteries O.O#. #.O#. with
> > /Software/Embedded Controllers) .OO#. .OO#.
> rocks...1k
> >
> ---------------------------------------------------------------------------
> > Sent from my phone. Please excuse my brevity.
> >
> > Yi Yuan <lamban...@gmail.com> wrote:
> >
> > >I installed jpeg package and tried to use
> > >
> > >kim<-readJPEG("kim.jpeg") to read in a jpeg file, but R gave me an
> > >error:
> > >Error in readJPEG("kim.jpeg") : unable to open kim.jpeg
> > >
> > >I already put "kim.jpeg" in Rstudio's default working directory:
> > >"E:\home
> > >work\Rstudio". So I don't think it's a problem caused by omitting the
> > >file's
> > >path. But I tried with the full path version just in case and still got
> > >the
> > >"unable to open" error:
> > >
> > >kim<-readJPEG("E:\\ home work\\Rstudio\\kim.jpeg")
> > >Error in readJPEG("E:\\ home work\\Rstudio\\kim.jpeg") :
> > > unable to open E:\ home work\Rstudio\kim.jpeg
> > >
> > >So now I really don't know what is wrong.
> > >
> > > [[alternative HTML version deleted]]
> > >
> > >______________________________________________
> > >R-help@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.
> >
> > ______________________________________________
> > R-help@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.
>
[[alternative HTML version deleted]]
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