Hello,
Can you post the output of
dput(head(total_name))
?
Rui Barradas
Às 18:35 de 19/09/2022, Kai Yang escreveu:
Hi Rui,I put original file names and target file names into data frame:
total_name. I can use
file.rename("out_1.pdf", "abc_title.pdf")
to rename a single file. But I hope to use loop to complete the task. So I
write a code below:
for (i in seq_len(nrow(total_name)))
{
with(
total_name[i, ],
{
file.rename(total_name$orig, total_name$target)
}
)
}
But I got error message:
Error in file.rename(total_name$orig, total_name$target) :
invalid 'from' argument
I think the problem happen due to quotation problem. Do you know how to fix it?
Thanks,
Kai On Friday, September 16, 2022 at 08:32:53 PM PDT, Rui Barradas
<ruipbarra...@sapo.pt> wrote:
Hello,
My understanding of the problem is different, the files' first row is
not tabular data, I might be wrong but it seems to me that it's
something like
first row [of] file1.txt [is]:
abc.txt
file2.txt:
bed.txt
etc.
That's why the sapply loop reads one datum only and exits.
Hope this helps,
Rui Barradas
Às 02:29 de 17/09/2022, Ebert,Timothy Aaron escreveu:
The syntax might not be quite right, but why not something like
file.rename(colnames(dataframe)[1]) -- Using colnames to get the names of the
columns that are in the first row, selecting the first element from colnames()
and setting the file name equal to that.
Do a for loop using current file names in some folder, and save to a new folder.
Tim
-----Original Message-----
From: R-help <r-help-boun...@r-project.org> On Behalf Of Kai Yang via R-help
Sent: Friday, September 16, 2022 1:52 PM
To: R-help Mailing List <r-help@r-project.org>; Rui Barradas
<ruipbarra...@sapo.pt>
Subject: Re: [R] rename files in R
[External Email]
Hello,Here is the example:
file name first row file1.txt abc.txt file2.txt bed.txt
file3.txt gogo.txt . . file1243.txt last.txt
I want to use loop because I need to read the first row information for first file,
and then rename the file, then go to next file. I'm not sure if this is right way to
approach my goal. Any suggestion will be appreciated. Thanks, Kai On Friday,
September 16, 2022 at 10:38:32 AM PDT, Rui Barradas <ruipbarra...@sapo.pt>
wrote:
Hello,
Please post the first row of 2 or 3 files and the expected result.
You can rename files with ?file.rename. This function is vectorized its on
arguments so you do not need a loop, only the source and destination filenames.
Both vectors should have the same length, if not strange things will occur
including data loss.
Hope this helps,
Rui Barradas
Às 18:26 de 16/09/2022, Kai Yang via R-help escreveu:
Hello,I have a lot of files with not meaningful name, such as:
file1.txt, file2.txt ...... I need to rename them using the
information from the first row of the files. Now I can get the
information from the first row of each file. Now, I need know how to
rename them in R (using loop?). Thank you for your helpKai
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