I have used the biOps package to read pictures and it works fine.
For example you can plot a pic just by:
library(biOps)
x <- readJpeg("mypic.jpg") ##mypic should be in you working directory
plot(x)
Notice that is only one uppercase letter on "readJpeg" and mypic is "jpg" not
"jpeg"
Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA
http://www.fws.gov/redbluff/rbdd_jsmp.aspx
>________________________________
>From: William Dunlap <wdun...@tibco.com>
>To: Jeff Newmiller <jdnew...@dcn.davis.ca.us>; Yi Yuan <lamban...@gmail.com>;
>"r-help@r-project.org" <r-help@r-project.org>
>Sent: Monday, January 14, 2013 8:44 AM
>Subject: Re: [R] readJPEG function cannot open jpeg files
>
>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.
>
>______________________________________________
>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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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
