Re: [R] readJPEG function cannot open jpeg files
On 01/15/2013 08:04 AM, Duncan Murdoch wrote: SNIP I've never understood why Microsoft thinks it is good to display incomplete filenames. This practice causes so many problems. SNIP Personally, I never understand Why Microsoft?. cheers, Rolf Turner __ 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] readJPEG function cannot open jpeg files
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.
Re: [R] readJPEG function cannot open jpeg files
Similar issue with URLs: yesWeCan - http://upload.wikimedia.org/wikipedia/commons/9/9d/Barack_Obama.jpg; url(yesWeCan) description http://upload.wikimedia.org/wikipedia/commons/9/9d/Barack_Obama.jpg; class url mode r text text opened closed can read yes can write no readJPEG(yesWeCan) Error in readJPEG(yesWeCan) : unable to open http://upload.wikimedia.org/wikipedia/commons/9/9d/Barack_Obama.jpg On 14 January 2013 14:57, 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.
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 NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.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.
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 NANA 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 NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.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.
Re: [R] readJPEG function cannot open jpeg files
On 14/01/2013 16:26, Suzen, Mehmet wrote: Similar issue with URLs: Not a similar issue at all: a URL is not a file. That most functions in R itself open connections including URLs does not mean that contributed packages do. The package help is quite specific about its requirements. source: Either name of the file to read from or a raw vector representing the JPEG file content. Which suggests to you how you can do this, apart from download.file, of course. Something like readJPEG(readBin(yesWeCan, raw, 1e6)) yesWeCan - http://upload.wikimedia.org/wikipedia/commons/9/9d/Barack_Obama.jpg; url(yesWeCan) description http://upload.wikimedia.org/wikipedia/commons/9/9d/Barack_Obama.jpg; class url mode r text text opened closed can read yes can write no readJPEG(yesWeCan) Error in readJPEG(yesWeCan) : unable to open http://upload.wikimedia.org/wikipedia/commons/9/9d/Barack_Obama.jpg On 14 January 2013 14:57, 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. -- Brian D. Ripley, rip...@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 __ 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.
Re: [R] readJPEG function cannot open jpeg files
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]] __ 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
[R] readJPEG function cannot open jpeg files
Hi, r-help mailing list subscribers, 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. Thanks for your help! [[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.
Re: [R] readJPEG function cannot open jpeg files
Thanks William ! file.info(E:/ home work/Rstudio/kim.jpeg) size isdir mode mtime ctime atime exe E:/home work/Rstudio/kim.jpeg NANA 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/Rstudio0 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 NANA 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 NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.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]] __ 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.
Re: [R] readJPEG function cannot open jpeg files
Hi, guys, my problem is solved. I used file.info(list.files(getwd(),full.names=TRUE)) and found out that the said file is listed as kim.jpg instead of kim.jpeg. So kim-readJPEG(kim.jpg) worked. Thanks for your help and sorry for my newbie question. On Mon, Jan 14, 2013 at 11:59 AM, Yi Yuan lamban...@gmail.com wrote: Thanks William ! file.info(E:/ home work/Rstudio/kim.jpeg) size isdir mode mtime ctime atime exe E:/home work/Rstudio/kim.jpeg NANA 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/Rstudio0 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.comwrote: 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 NANA 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 NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.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]] __ R-help@r-project.org mailing list https
Re: [R] readJPEG function cannot open jpeg files
On 13-01-14 11:59 AM, Yi Yuan wrote: Thanks William ! file.info(E:/ home work/Rstudio/kim.jpeg) size isdir mode mtime ctime atime exe E:/home work/Rstudio/kim.jpeg NANA 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/Rstudio0 TRUE 777 2013-01-13 22:12:58 2013-01-13 20:57:36 2013-01-13 22:12:58 no Any help ? You seem to sometimes have spaces ahead of home and sometimes not. What I recommend most people do on Windows is not to try to type the filename yourself, use file.choose() or choose.files() to get a dialog box and pick it out of there. Duncan Murdoch 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 NANA 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 NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.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]] __ 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
Re: [R] readJPEG function cannot open jpeg files
On 13-01-14 12:18 PM, Yi Yuan wrote: Hi, guys, my problem is solved. I used file.info(list.files(getwd(),full.names=TRUE)) and found out that the said file is listed as kim.jpg instead of kim.jpeg. So kim-readJPEG(kim.jpg) worked. Thanks for your help and sorry for my newbie question. Another recommendation I make for all Windows users is to change the Explorer options to display full filenames. That would have prevented this error. (This is an option in Windows, not in R.) I've never understood why Microsoft thinks it is good to display incomplete filenames. This practice causes so many problems. Duncan Murdoch On Mon, Jan 14, 2013 at 11:59 AM, Yi Yuan lamban...@gmail.com wrote: Thanks William ! file.info(E:/ home work/Rstudio/kim.jpeg) size isdir mode mtime ctime atime exe E:/home work/Rstudio/kim.jpeg NANA 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/Rstudio0 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.comwrote: 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 NANA 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 NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.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
Re: [R] readJPEG function cannot open jpeg files
On 14 January 2013 18:56, Prof Brian Ripley rip...@stats.ox.ac.uk wrote: On 14/01/2013 16:26, Suzen, Mehmet wrote: Similar issue with URLs: Not a similar issue at all: a URL is not a file. That most functions in R itself open connections including URLs does not mean that contributed packages do. The package help is quite specific about its requirements. source: Either name of the file to read from or a raw vector representing the JPEG file content. Which suggests to you how you can do this, apart from download.file, of course. Something like readJPEG(readBin(yesWeCan, raw, 1e6)) Dear Prof. Ripley, Thank you for the correction. I was thinking in the lines of 'Everything is a file' concept. (http://en.wikipedia.org/wiki/Everything_is_a_file). Best, -m __ 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.
