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how to read a file containing a series filename
7 messages · Jie Tang, jim holtman, kees duineveld
This works fine for me; look at your options on 'scan':
x <- scan(text = "H20100902.TXT
+ H20100903.TXT + H20100904.TXT + H20100905.TXT + H20100906.TXT + H20100907.TXT + H20100908.TXT", what = '') Read 7 items
cat(x, file = 'file.txt', sep = '\n') # create the 'file.txt'
files <- scan('file.txt', what = '') # read names from the file
Read 7 items
files # display the names
[1] "H20100902.TXT" "H20100903.TXT" "H20100904.TXT" "H20100905.TXT" "H20100906.TXT" [6] "H20100907.TXT" "H20100908.TXT"
On Wed, Mar 7, 2012 at 8:49 AM, Jie Tang <totangjie at gmail.com> wrote:
hi everyone .
I have a group of files that needs to be read in .
And I put their filename into one file with the name "file.txt"
And in the file.txt,the filename are shown as below :
H20100902.TXT
H20100903.TXT
H20100904.TXT
H20100905.TXT
H20100906.TXT
H20100907.TXT
H20100908.TXT
Now I want to read these file from the file.txt by such ?codes:
filename <-("file.txt")
pp <- scan(filename,what=list(""),sep=" ")
but R shows ?that :
pp
[[1]] that is pp is just one dimension data? but when I type
pp[1]
the filenames are shown. How could I read these filenames into one array and so that .I can read the data by such a command ? ddata<-scan(pp[2],what=datalist,na.strings = 999) thank you . -- TANG Jie Email: totangjie at gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China ? ? ? ?[[alternative HTML version deleted]]
______________________________________________ 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.
Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it.
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you have to tell 'scan' to read characters with what = ''
On Wed, Mar 7, 2012 at 9:44 AM, Jie Tang <totangjie at gmail.com> wrote:
there is something wrong : scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, ?: ? scan() needs 'a real', but not 'H20100903.TXT' 2012/3/7 jim holtman <jholtman at gmail.com>
This works fine for me; look at your options on 'scan':
x <- scan(text = "H20100902.TXT
+ H20100903.TXT + H20100904.TXT + H20100905.TXT + H20100906.TXT + H20100907.TXT + H20100908.TXT", what = '') Read 7 items
cat(x, file = 'file.txt', sep = '\n') ?# create the 'file.txt'
files <- scan('file.txt', what = '') ?# read names from the file
Read 7 items
files ?# display the names
[1] "H20100902.TXT" "H20100903.TXT" "H20100904.TXT" "H20100905.TXT" "H20100906.TXT" [6] "H20100907.TXT" "H20100908.TXT"
On Wed, Mar 7, 2012 at 8:49 AM, Jie Tang <totangjie at gmail.com> wrote:
hi everyone .
I have a group of files that needs to be read in .
And I put their filename into one file with the name "file.txt"
And in the file.txt,the filename are shown as below :
H20100902.TXT
H20100903.TXT
H20100904.TXT
H20100905.TXT
H20100906.TXT
H20100907.TXT
H20100908.TXT
Now I want to read these file from the file.txt by such ?codes:
filename <-("file.txt")
pp <- scan(filename,what=list(""),sep=" ")
but R shows ?that :
pp
[[1]] that is pp is just one dimension data? but when I type
pp[1]
the filenames are shown. How could I read these filenames into one array and so that .I can read the data by such a command ? ddata<-scan(pp[2],what=datalist,na.strings = 999) thank you . -- TANG Jie Email: totangjie at gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China ? ? ? ?[[alternative HTML version deleted]]
______________________________________________ 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.
-- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it.
-- TANG Jie Email: totangjie at gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China
Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it.
here is my file.txt that generated by other command "ls " 2012/3/7 Jie Tang <totangjie at gmail.com>
there is something wrong : scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, : scan() needs 'a real', but not 'H20100903.TXT' 2012/3/7 jim holtman <jholtman at gmail.com>
This works fine for me; look at your options on 'scan':
x <- scan(text = "H20100902.TXT
+ H20100903.TXT + H20100904.TXT + H20100905.TXT + H20100906.TXT + H20100907.TXT + H20100908.TXT", what = '') Read 7 items
cat(x, file = 'file.txt', sep = '\n') # create the 'file.txt'
files <- scan('file.txt', what = '') # read names from the file
Read 7 items
files # display the names
[1] "H20100902.TXT" "H20100903.TXT" "H20100904.TXT" "H20100905.TXT" "H20100906.TXT" [6] "H20100907.TXT" "H20100908.TXT"
On Wed, Mar 7, 2012 at 8:49 AM, Jie Tang <totangjie at gmail.com> wrote:
hi everyone .
I have a group of files that needs to be read in .
And I put their filename into one file with the name "file.txt"
And in the file.txt,the filename are shown as below :
H20100902.TXT
H20100903.TXT
H20100904.TXT
H20100905.TXT
H20100906.TXT
H20100907.TXT
H20100908.TXT
Now I want to read these file from the file.txt by such codes:
filename <-("file.txt")
pp <- scan(filename,what=list(""),sep=" ")
but R shows that :
pp
[[1]] that is pp is just one dimension data? but when I type
pp[1]
the filenames are shown.
How could I read these filenames into one array
and so that .I can read the data by such a command ?
ddata<-scan(pp[2],what=datalist,na.strings = 999)
thank you .
--
TANG Jie
Email: totangjie at gmail.com
Tel: 0086-2154896104
Shanghai Typhoon Institute,China
[[alternative HTML version deleted]]
______________________________________________ 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. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it.
-- TANG Jie Email: totangjie at gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China
TANG Jie Email: totangjie at gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China -------------- next part -------------- H20080728.TXT H20090808.TXT H20090809.TXT H20100830.TXT H20100831.TXT H20100901.TXT H20100902.TXT H20100903.TXT H20100904.TXT H20100905.TXT H20100906.TXT H20100907.TXT H20100908.TXT H20100909.TXT H20100910.TXT H20100911.TXT H20100912.TXT H20100913.TXT H20100914.TXT H20100915.TXT H20100916.TXT H20100917.TXT H20100918.TXT H20100919.TXT H20100920.TXT H20100921.TXT H20100922.TXT H20100923.TXT H20100924.TXT H20100925.TXT H20100926.TXT H20100927.TXT H20100928.TXT H20100929.TXT H20100930.TXT H20101001.TXT H20101002.TXT H20101003.TXT H20101004.TXT H20101005.TXT H20101006.TXT H20101007.TXT H20101008.TXT H20101009.TXT H20101010.TXT H20101011.TXT H20101012.TXT H20101013.TXT H20101014.TXT H20101015.TXT H20101016.TXT H20101017.TXT H20101018.TXT H20101019.TXT H20101020.TXT H20101021.TXT H20101022.TXT H20101023.TXT H20101024.TXT
Hi Jie,
Are you looking for this construction?
mydata <- apply(c("H20100902.TXT", "H20100903.TXT" ,"H20100904.TXT"
,"H20100905.TXT", "H20100906.TXT",
"H20100907.TXT","H20100908.TXT"),function(x) scan(x, other options))
Kees
On Wed, Mar 7, 2012 at 3:44 PM, Jie Tang <totangjie at gmail.com> wrote:
there is something wrong : scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, ?: ?scan() needs 'a real', but not 'H20100903.TXT' 2012/3/7 jim holtman <jholtman at gmail.com>
This works fine for me; look at your options on 'scan':
x <- scan(text = "H20100902.TXT
+ H20100903.TXT + H20100904.TXT + H20100905.TXT + H20100906.TXT + H20100907.TXT + H20100908.TXT", what = '') Read 7 items
cat(x, file = 'file.txt', sep = '\n') ?# create the 'file.txt'
files <- scan('file.txt', what = '') ?# read names from the file
Read 7 items
files ?# display the names
[1] "H20100902.TXT" "H20100903.TXT" "H20100904.TXT" "H20100905.TXT" "H20100906.TXT" [6] "H20100907.TXT" "H20100908.TXT"
On Wed, Mar 7, 2012 at 8:49 AM, Jie Tang <totangjie at gmail.com> wrote:
hi everyone .
I have a group of files that needs to be read in .
And I put their filename into one file with the name "file.txt"
And in the file.txt,the filename are shown as below :
H20100902.TXT
H20100903.TXT
H20100904.TXT
H20100905.TXT
H20100906.TXT
H20100907.TXT
H20100908.TXT
Now I want to read these file from the file.txt by such ?codes:
filename <-("file.txt")
pp <- scan(filename,what=list(""),sep=" ")
but R shows ?that :
pp
[[1]] that is pp is just one dimension data? but when I type
pp[1]
the filenames are shown. How could I read these filenames into one array and so that .I can read the data by such a command ? ddata<-scan(pp[2],what=datalist,na.strings = 999) thank you . -- TANG Jie Email: totangjie at gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China ? ? ? ?[[alternative HTML version deleted]]
______________________________________________ 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. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it.
-- TANG Jie Email: totangjie at gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China ? ? ? ?[[alternative HTML version deleted]]
______________________________________________ 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.
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