Rui Barradas
2012-Sep-18 13:52 UTC
[R] Appending many different and separate Excel files using R
Hello,
This is the sort of question that could interess others, so you should
have CCed it to the list.
As for the question, from the package vignette, section 3.3.6:
"writeWorksheetToFile() is a wrapper function, calling loadWorkbook(),
createSheet() and saveWorkbook()
functions subsequently. It therefore allows for writing data into
worksheets of an Excel file in one call."
To see it, run
vignette('XLConnect', 'XLConnect')
Since it seems that you don't need several worksheets in the output
file, a work around would be to use write.csv, like you do in your post.
With the side effect that any other software package would be able to
access, and get rid of Excel dependency.
But if for some reason you need Excell, then the error message is clear,
only file extensions xls and xlsx are allowed.
Rui Barradas
Em 18-09-2012 13:54, Amir Kasaeian escreveu:>
>
>
> Hello,
> Thank you for all your support and help.
> It works though I have a new problem and I don?t know can I ask you my
questions.
> For example, I encountered the below message when I append 30 files each of
size 1000 observations with about 100 variables which differ in ten of them.
> After performing the final line of the R codes I encountered the below
message I don?t know how to resolve it.
> Thanks for your help in advance.
> Kind regards,
> Amir
>
> write.table(result, "result.csv", quote=F, row.names = T, sep
=",")
>> writeWorksheetToFile(output.file, data = result, sheet =
"AllSteps",
> + startRow = 1, startCol = 1)
> Error: IllegalArgumentException (Java): File extension "csv" not
supported! Only *.xls and *.xlsx are allowed!
>
>
> --- On Wed, 22/8/12, Rui Barradas <ruipbarradas at sapo.pt> wrote:
>
>
> From: Rui Barradas <ruipbarradas at sapo.pt>
> Subject: Re: [R] Appending many different and separate Excel files using R
> To: "Amir Kasaeian" <amir_kasaeian at yahoo.com>
> Cc: "r-help" <r-help at r-project.org>
> Date: Wednesday, 22 August, 2012, 6:14 PM
>
>
> Hello,
>
> I'm glad it helped.
>
> As for books on R, there are so many nowadays that it's difficult to
> recommend one. I'd start by seeing the R home page
> http://www.r-project.org/ and the links on the lower left, under the title
> Documentation > Books
> or, for free downloads,
> Documentation > Other > contributed documentation
>
> The links also point to the R Wiki, http://rwiki.sciviews.org/doku.php.
> In fact, the large number of documentation, code examples, etc, make of
> Google a very good friend :)
> To make it better, and more complete, some of the web pages are very
> general, others dedicated to certain fields
> Examples of usefull links, one of each type, are, for instance,
>
> http://stackoverflow.com/questions/tagged/r
> http://addictedtor.free.fr/graphiques/
>
> And many others.
> And, of course, the manuals that come with R.
>
> Rui Barradas
>
> Em 22-08-2012 06:20, Amir Kasaeian escreveu:
>> Dear Rui,
>>
>> Good day!
>>
>> Thank you very much. The great codes!
>> My other question is that which book or books do you introduce me If I
ask you to recommend some R best books, especially in the field of programming?
>> Thanks all your attention.
>>
>> Kind regards,
>> Amir Kasaeian
>>
>>
>>
>> Amir Kasaeian,
>> PhD Student in Biostatistics,
>> Dept. of Epidemiology and Biostatistics,
>> School of Public Health,
>> Tehran University of Medical Sciences (TUMS).
>> P.B. : 14155-6446
>> Cell Phone: +98-912-2063511
>> E-mail: akasaeian at razi.tums.ac.ir
>> amir_kasaeian at yahoo.com
>>
>>
>> --- On Sat, 18/8/12, Rui Barradas <ruipbarradas at sapo.pt>
wrote:
>>
>>
>> From: Rui Barradas <ruipbarradas at sapo.pt>
>> Subject: Re: [R] Appending many different and separate Excel files
using R
>> To: "Amir Kasaeian" <amir_kasaeian at yahoo.com>
>> Cc: "r-help" <r-help at r-project.org>
>> Date: Saturday, 18 August, 2012, 10:33 PM
>>
>>
>> Hello,
>>
>> Try the following.
>>
>>
>> # This needs several other packages
>> # install.packages("XLConnect")
>> require(XLConnect)
>>
>> fpattern <- "Book.*.xls?" # pattern for filenames
>> output.file <- "Test.xls"
>> lfiles <- list.files(pattern = fpattern)
>>
>> # Read first worksheet from each file
>> data.lst <-lapply(lfiles, readWorksheetFromFile, sheet = 1)
>>
>> # Get column names from data.frames
>> data.names <- lapply(data.lst, names)
>>
>> # Create a result data.frame, we are going
>> # to put everything here
>> result <- data.frame(Book = 1, data.lst[[1]])
>>
>> # Work variable, which column names do we
>> # already have in 'result'
>> current.names <- c("Book", data.names[[1]])
>> #
>> for(i in seq_along(data.lst)[-1]){
>> new.names <- setdiff(data.names[[i]], current.names)
>> current.names <- union(current.names, new.names)
>> for(nm in new.names)
>> result[[ nm ]] <- NA
>> tmp <- as.data.frame(matrix(nrow = nrow(data.lst[[i]]), ncol
>> ncol(result)))
>> names(tmp) <- current.names
>> tmp[[ "Book" ]] <- i
>> tmp[ , data.names[[i]] ] <- data.lst[[i]]
>> result <- rbind(result, tmp)
>> }
>>
>> writeWorksheetToFile(output.file, data = result, sheet =
"AllBooks",
>> startRow = 1, startCol = 1)
>>
>> Hope this helps,
>>
>> Rui Barradas
>> Em 18-08-2012 00:04, Amir Kasaeian escreveu:
>>> Dear Rui,
>>>
>>> Thank you very much for your message.
>>> Suppose we have 3 Excel files: Book1, Book2 and Book3 in a single
directory. Please note the headers and their order. I need an output EXCEL file
like Amir which includes all the information of the 3 Booki files. I think with
the attached file I explain my problem.
>>> As a matter of fact, I need to creat a new file named Amir which
has the information of the same and different variable from different excel file
with a single spreadsheet below each others and it has the new variable named
"Book" indicate which row come from which file.
>>> Is my information enough ?
>>>
>>> Again, thank you very much.
>>>
>>> Best,
>>> Amir
>>>
>>>
>>>
>>> Amir Kasaeian,
>>> PhD Student in Biostatistics,
>>> Dept. of Epidemiology and Biostatistics,
>>> School of Public Health,
>>> Tehran University of Medical Sciences (TUMS).
>>> P.B. : 14155-6446
>>> Cell Phone: +98-912-2063511
>>> E-mail: akasaeian at razi.tums.ac.ir
>>> amir_kasaeian at yahoo.com
>>>
>>>
>>> --- On Sat, 18/8/12, Rui Barradas <ruipbarradas at sapo.pt>
wrote:
>>>
>>>
>>> From: Rui Barradas <ruipbarradas at sapo.pt>
>>> Subject: Re: [R] Appending many different and separate Excel files
using R
>>> To: "Amir Kasaeian" <amir_kasaeian at yahoo.com>
>>> Cc: "r-help" <r-help at r-project.org>
>>> Date: Saturday, 18 August, 2012, 3:37 AM
>>>
>>>
>>>
>>> Hello,
>>>
>>> You need to provide us with a bit more information:
>>> Do all the files have the same structure, i.e., tables with the
same columns? No Are they xls, xlsx or csv files? they may be in each of the
three types Do their names share something in common such as a preffix or are
they alone in the directory, or...? No, they are with different name without
sth in common When you write "in the final file" does this mean that
you want to output two files, one with the data and the other with the filenames
No, Just one file including all the variable from different files with new
variable indicating which row of data come from which file
>>> It would be nice if (a) the files were csv files, (b) if you answer
to some or all of the rest, (c) anything that I might have forgotten and you
find usefull.
>>> I think nothing left to say.
>>> Rui Barradas thank you very much Rui
>>>
>>>
>>> Em 17-08-2012 22:19, Amir Kasaeian escreveu:
>>>
>>> Dear all,
>>> Good day!
>>> I have a problem in reading Excel files in R and appending them to
each other. Suppose we have several Excel files in a directory with headers and
want to use R to append them in a single file with an additional variable in the
final file indicating from which files the data come from.
>>> As I have many Excel files and their sizes are very big I should
write a loop in R to do the work.
>>> I will be very happy if you guide and help me to write the codes.
>>> Thank you very much in advance.
>>>
>>> Kind regards,
>>> Amir Kasaeian
>>>
>>>
>>>
>>>
>>> Amir Kasaeian,
>>> PhD Student in Biostatistics,
>>> Dept. of Epidemiology and Biostatistics,
>>> School of Public Health,
>>> Tehran University of Medical Sciences (TUMS).
>>> P.B. : 14155-6446
>>> Cell Phone: +98-912-2063511
>>> E-mail: akasaeian at razi.tums.ac.ir
>>> amir_kasaeian at yahoo.com
>>>
>>> [[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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