Re: [R] write.csv / string extraction and field limits
This example works fine: test-matrix(c(1,2,'VOICIUNPETITTES',3),ncol=2,nrow=2) write.csv(test,file='C:/xavier/test.csv') Could you provide the same small example when it doesn't work? kwaj wrote: Hello, I have a peculiar problem which I am hoping I can get help on. I am using the write.csv command to write a matrix structure to a file, which I later read in excel. The command works quite well for most strings and numerical values in the matrix structure. However, I have found that when a field in the matrix contains a string of long length, when the matrix is finally written the file - the field shows up as NA. I am assuming write.csv has a limit on the field size? Maybe 16 characters? Assuming the above is correct - I tried to extract a portion of the string using the 'substring' command and enter the extracted portion into the field before using the write.csv command. However I find, that when a string is extracted, the output from write.csv generates a NA in the file output. My questions are: 1) Does write.csv have a limit on the size of strings in the matrix fields? Is there anyway to place large strings in the field? 2) Is there anyway to make the substring command or an alternative but similar command, compatible with write.csv? I have tried 'as.character(substring(phrase, min, max)' and that does not seem to work cheers -- View this message in context: http://www.nabble.com/write.csv---string-extraction-and-field-limits-tf4395535.html#a12596551 Sent from the R help mailing list archive at Nabble.com. __ R-help@stat.math.ethz.ch 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] write.csv / string extraction and field limits
Hello, I have a peculiar problem which I am hoping I can get help on. I am using the write.csv command to write a matrix structure to a file, which I later read in excel. The command works quite well for most strings and numerical values in the matrix structure. However, I have found that when a field in the matrix contains a string of long length, when the matrix is finally written the file - the field shows up as NA. I am assuming write.csv has a limit on the field size? Maybe 16 characters? Assuming the above is correct - I tried to extract a portion of the string using the 'substring' command and enter the extracted portion into the field before using the write.csv command. However I find, that when a string is extracted, the output from write.csv generates a NA in the file output. My questions are: 1) Does write.csv have a limit on the size of strings in the matrix fields? Is there anyway to place large strings in the field? 2) Is there anyway to make the substring command or an alternative but similar command, compatible with write.csv? I have tried 'as.character(substring(phrase, min, max)' and that does not seem to work cheers -- View this message in context: http://www.nabble.com/write.csv---string-extraction-and-field-limits-tf4395535.html#a12534347 Sent from the R help mailing list archive at Nabble.com. __ R-help@stat.math.ethz.ch 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] write.csv
Hi, I want to save an array(say, array[6,7,8]) write a cvs file. How can I do that??? can I write in one file? if I could not write in one file, i want to use a loop to save in different files (in the array[6,7,8], should be 8 csv files), such as the filename structure should be: file =filename +str(i) +. +csv Many thanks. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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] write.csv
Thanks Ted for the help. I will try and see if my case will get the expected results. Dong On 7/30/07, Ted Harding [EMAIL PROTECTED] wrote: On 29-Jul-07 17:41:58, Dong GUO ¹ù¶« wrote: Hi, I want to save an array(say, array[6,7,8]) write a cvs file. How can I do that??? can I write in one file? if I could not write in one file, i want to use a loop to save in different files (in the array[6,7,8], should be 8 csv files), such as the filename structure should be: file =filename +str(i)+. +csv Many thanks. The following (illustrated on a smaller array) may help: A-array((1:60),dim=c(3,4,5)) D-dim(A) write.table(t(dim(A)),file=A.csv,sep=,, quote=FALSE,row.names=FALSE,col.names=FALSE) Z-as.vector(A) write.table(t(Z),file=A.csv,append=TRUE,sep=,, quote=FALSE,row.names=FALSE,col.names=FALSE) Then the file A.csv contains two rows: 3,4,5 1,2,3,4,5,6,7,8,9,10,11,12, ... ,55,56,57,58,59,60 of which the first gives the dimension, the second the data for the array. You can then reconstruct another array, say B, as: dimB-scan(file=A.csv,sep=,,nlines=1) dataB-scan(file=A.csv,sep=,,skip=1,nlines=1) B-array(dataB,dimB) That's a hard way to do things, perhaps, but since you said you wanted the array as a CSV file, this is one way to do that. Since a CSV text file is essentially a two-dimensional object (fields in rows, by rows), to store a higher-dimensional object in such a format you have to include the meta-data about the structure -- in this case the list of dimensions. Note, however, that, although it is a CSV file, read.csv(A.csv,header=FALSE) will not work nicely, since it will give you two rows of equal length, the first one padded out with (in this case 57) NAs, which you will then have to clean up; which you can do, but by the time you've done it you might as well have done it the above way! Hoping this helps, Ted. E-Mail: (Ted Harding) [EMAIL PROTECTED] Fax-to-email: +44 (0)870 094 0861 Date: 30-Jul-07 Time: 22:24:12 -- XFMail -- [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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] write.csv
the dim of my results is (26,31,8) -(years, regions and variables). so, if i save each (years, regions) in 8 csv files, later, I could connect the (26,31) to dbf file in ArcGIS to show in a map. This is what I intend to do. I dont know a better way to do it directly in R... On 7/31/07, jim holtman [EMAIL PROTECTED] wrote: It really depends on how you want it output. You can use 'write.csv' to write an array out and it will be a 2-dimentional image that you could then reconstruct it from if you know what the dimensions were. What do you want to do with the data? If you are just going to read it back into R, then use save/load. On 7/29/07, Dong GUO ¹ù¶« [EMAIL PROTECTED] wrote: Hi, I want to save an array(say, array[6,7,8]) write a cvs file. How can I do that??? can I write in one file? if I could not write in one file, i want to use a loop to save in different files (in the array[6,7,8], should be 8 csv files), such as the filename structure should be: file =filename +str(i) +. +csv Many thanks. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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 Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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] write.csv
Then you can just write a 'for' loop to write out each submatrix:
for (i in 1:dim(x)[3]){
write.csv(x[,,i], paste(x, i, .csv, sep=))
}
On 7/30/07, Dong GUO 郭东 [EMAIL PROTECTED] wrote:
the dim of my results is (26,31,8) -(years, regions and variables). so, if i
save each (years, regions) in 8 csv files, later, I could connect the
(26,31) to dbf file in ArcGIS to show in a map. This is what I intend to do.
I dont know a better way to do it directly in R...
On 7/31/07, jim holtman [EMAIL PROTECTED] wrote:
It really depends on how you want it output. You can use 'write.csv'
to write an array out and it will be a 2-dimentional image that you
could then reconstruct it from if you know what the dimensions were.
What do you want to do with the data? If you are just going to read
it back into R, then use save/load.
On 7/29/07, Dong GUO 郭东 [EMAIL PROTECTED] wrote:
Hi,
I want to save an array(say, array[6,7,8]) write a cvs file. How can I
do
that??? can I write in one file?
if I could not write in one file, i want to use a loop to save in
different
files (in the array[6,7,8], should be 8 csv files), such as the filename
structure should be: file =filename +str(i) +. +csv
Many thanks.
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch 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
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
__
R-help@stat.math.ethz.ch 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] write.csv
Many thanks, Jim...
On 7/31/07, jim holtman [EMAIL PROTECTED] wrote:
Then you can just write a 'for' loop to write out each submatrix:
for (i in 1:dim(x)[3]){
write.csv(x[,,i], paste(x, i, .csv, sep=))
}
On 7/30/07, Dong GUO ¹ù¶« [EMAIL PROTECTED] wrote:
the dim of my results is (26,31,8) -(years, regions and variables). so,
if i
save each (years, regions) in 8 csv files, later, I could connect the
(26,31) to dbf file in ArcGIS to show in a map. This is what I intend to
do.
I dont know a better way to do it directly in R...
On 7/31/07, jim holtman [EMAIL PROTECTED] wrote:
It really depends on how you want it output. You can use 'write.csv'
to write an array out and it will be a 2-dimentional image that you
could then reconstruct it from if you know what the dimensions were.
What do you want to do with the data? If you are just going to read
it back into R, then use save/load.
On 7/29/07, Dong GUO ¹ù¶« [EMAIL PROTECTED] wrote:
Hi,
I want to save an array(say, array[6,7,8]) write a cvs file. How can
I
do
that??? can I write in one file?
if I could not write in one file, i want to use a loop to save in
different
files (in the array[6,7,8], should be 8 csv files), such as the
filename
structure should be: file =filename +str(i) +. +csv
Many thanks.
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch 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
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
[[alternative HTML version deleted]]
__
R-help@stat.math.ethz.ch 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] write.csv
On 29-Jul-07 17:41:58, Dong GUO ¹ù¶« wrote: Hi, I want to save an array(say, array[6,7,8]) write a cvs file. How can I do that??? can I write in one file? if I could not write in one file, i want to use a loop to save in different files (in the array[6,7,8], should be 8 csv files), such as the filename structure should be: file =filename +str(i)+. +csv Many thanks. The following (illustrated on a smaller array) may help: A-array((1:60),dim=c(3,4,5)) D-dim(A) write.table(t(dim(A)),file=A.csv,sep=,, quote=FALSE,row.names=FALSE,col.names=FALSE) Z-as.vector(A) write.table(t(Z),file=A.csv,append=TRUE,sep=,, quote=FALSE,row.names=FALSE,col.names=FALSE) Then the file A.csv contains two rows: 3,4,5 1,2,3,4,5,6,7,8,9,10,11,12, ... ,55,56,57,58,59,60 of which the first gives the dimension, the second the data for the array. You can then reconstruct another array, say B, as: dimB-scan(file=A.csv,sep=,,nlines=1) dataB-scan(file=A.csv,sep=,,skip=1,nlines=1) B-array(dataB,dimB) That's a hard way to do things, perhaps, but since you said you wanted the array as a CSV file, this is one way to do that. Since a CSV text file is essentially a two-dimensional object (fields in rows, by rows), to store a higher-dimensional object in such a format you have to include the meta-data about the structure -- in this case the list of dimensions. Note, however, that, although it is a CSV file, read.csv(A.csv,header=FALSE) will not work nicely, since it will give you two rows of equal length, the first one padded out with (in this case 57) NAs, which you will then have to clean up; which you can do, but by the time you've done it you might as well have done it the above way! Hoping this helps, Ted. E-Mail: (Ted Harding) [EMAIL PROTECTED] Fax-to-email: +44 (0)870 094 0861 Date: 30-Jul-07 Time: 22:24:12 -- XFMail -- __ R-help@stat.math.ethz.ch 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] write.csv feature/bug with pipe
This is simply user error: the column names _are_ written to the pipe. Because the connection was not open, the connection is opened to write the column names, closed, opened to write the data and then closed. In any case, you should call close() on connections you create to avoid leaking connection structures. The following works: con - pipe(cat d2.csv, w) write.csv(d, file=con) close(con) write.table() does exactly the same thing. On Sun, 11 Mar 2007, ivo welch wrote: gentoo linux, version 2.4.1: d= as.data.frame(matrix(1:20, 4, 5)) d V1 V2 V3 V4 V5 1 1 5 9 13 17 2 2 6 10 14 18 3 3 7 11 15 19 4 4 8 12 16 20 write.csv(d, file=d1.csv); write.csv(d, file=pipe(cat d2.csv)) write.csv(d, file=pipe(gzip -c d3.csv.gz), col.names=T) Warning message: attempt to change 'col.names' ignored in: write.csv(d, file = pipe(gzip -c d4.csv.gz), col.names = T) (Seems unlikely the message got the file name wrong here.) exit and $ head d1.csv ,V1,V2,V3,V4,V5 1,1,5,9,13,17 2,2,6,10,14,18 3,3,7,11,15,19 4,4,8,12,16,20 $ head d2.csv 1,1,5,9,13,17 2,2,6,10,14,18 3,3,7,11,15,19 4,4,8,12,16,20 is it a bug or a feature that when pipe is used, the col.names is set to false? I guess I can invoke write.table to get the headers back. regards, /iaw __ R-help@stat.math.ethz.ch 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, [EMAIL PROTECTED] 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@stat.math.ethz.ch 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] write.csv feature/bug with pipe
gentoo linux, version 2.4.1: d= as.data.frame(matrix(1:20, 4, 5)) d V1 V2 V3 V4 V5 1 1 5 9 13 17 2 2 6 10 14 18 3 3 7 11 15 19 4 4 8 12 16 20 write.csv(d, file=d1.csv); write.csv(d, file=pipe(cat d2.csv)) write.csv(d, file=pipe(gzip -c d3.csv.gz), col.names=T) Warning message: attempt to change 'col.names' ignored in: write.csv(d, file = pipe(gzip -c d4.csv.gz), col.names = T) exit and $ head d1.csv ,V1,V2,V3,V4,V5 1,1,5,9,13,17 2,2,6,10,14,18 3,3,7,11,15,19 4,4,8,12,16,20 $ head d2.csv 1,1,5,9,13,17 2,2,6,10,14,18 3,3,7,11,15,19 4,4,8,12,16,20 is it a bug or a feature that when pipe is used, the col.names is set to false? I guess I can invoke write.table to get the headers back. regards, /iaw __ R-help@stat.math.ethz.ch 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] write.csv + appending output (FILE I/O)
Hi,
How can I write the output to an excel (csv) file without printing row names
(i.e without breaks). Here is my code:
library(
fn - function()
{
q - c(1,2,3)
write.csv(q,C:/Temp/op.xls, append = TRUE, row.names = FALSE,quote = FALSE)
}
# Function Call
for(i in 1:3)
{
fn()
}
Present Output :
x123x123x123
Desired output:
1
2
3
1
2
3
1
2
3
Also it displays following warning messages.
Warning messages:
1: appending column names to file in: write.table(q, C:/Temp/op.xls,
2: appending column names to file in: write.table(q, C:/Temp/op.xls,
3: appending column names to file in: write.table(q, C:/Temp/op.xls,
I am using R2.2.1 windows version. I tried using write.xls from marray
package but no success.
Thanx in advance.
Sachin
__
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Re: [R] write.csv + appending output (FILE I/O)
When submitting your example under R.2.3.0 WinXP, the resulting xls file
was output row-wise as requested. See results below. Not sure why yours
outputs columnar-wise.
To drop the variable name set col.names=FALSE. Note that the write.csv
wrapper is designed to be inflexible and that you will need to use
write.table instead. Here's a qoute from ?write.csv
These wrappers are deliberately inflexible: they are designed to
ensure that the correct conventions are used to write a valid
file. Attempts to change 'col.names', 'sep', 'dec' or 'qmethod'
are ignored, with a warning.
HTH,
-jason
Results from Sachin code.
** Begin XLS File ***
x
1
2
3
x
1
2
3
x
1
2
3
** End XLS File ***
- Original Message -
From: Sachin J [EMAIL PROTECTED]
To: R-help@stat.math.ethz.ch
Sent: Thursday, May 18, 2006 7:36 AM
Subject: [R] write.csv + appending output (FILE I/O)
Hi,
How can I write the output to an excel (csv) file without printing row
names (i.e without breaks). Here is my code:
library(
fn - function()
{
q - c(1,2,3)
write.csv(q,C:/Temp/op.xls, append = TRUE, row.names = FALSE,quote =
FALSE)
}
# Function Call
for(i in 1:3)
{
fn()
}
Present Output :
x123x123x123
Desired output:
1
2
3
1
2
3
1
2
3
Also it displays following warning messages.
Warning messages:
1: appending column names to file in: write.table(q, C:/Temp/op.xls,
2: appending column names to file in: write.table(q, C:/Temp/op.xls,
3: appending column names to file in: write.table(q, C:/Temp/op.xls,
I am using R2.2.1 windows version. I tried using write.xls from marray
package but no success.
Thanx in advance.
Sachin
__
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