Hello,
R 4.1.0 on Ubuntu 20.04, sessionInfo at the end.
I'm arriving a bit late to this thread but here are the timings I'm
getting on an 10+ years old PC.
1. I am not getting anything even close to 5 or 10 mins running times.
2. Like Bill said, there seems to be a caching effect, the first r
On 9/27/2021 1:06 AM, Leonard Mada wrote:
>
> Dear Bill,
>
>
> Does list.files() always sort the results?
>
> It seems so. The option: full.names = FALSE does not have any effect:
> the results seem always sorted.
>
>
> Maybe it is better to process the files in an unsorted order: as
> stored o
Dear Bill,
Does list.files() always sort the results?
It seems so. The option: full.names = FALSE does not have any effect:
the results seem always sorted.
Maybe it is better to process the files in an unsorted order: as stored
on the disk?
Sincerely,
Leonard
On 9/25/2021 8:13 PM, Bill
What kind of disk do you use? The hardware differences might be important
to this issue.
Best,
Jiefei
Leonard Mada via R-help 于 2021年9月26日周日 下午9:04写道：
> Dear Bill,
>
>
> - using the Ms Windows Properties: ~ 15 s;
>
> [Windows new start, 1st operation, bulk size]
>
> - using R / file.info() (2nd
Dear Bill,
- using the Ms Windows Properties: ~ 15 s;
[Windows new start, 1st operation, bulk size]
- using R / file.info() (2nd operation): still 523.6 s
[and R seems mostly unresponsive during this time]
Unfortunately, I do not know how to clear any cache.
[The cache may play a role only
On a $150 second-hand laptop with 0.9GB of library,
and a single-user installation of R so only one place to look
LIBRARY=$HOME/R/x86_64-pc-linux-gnu-library/4.0
cd $LIBRARY
echo "kbytes package"
du -sk * | sort -k1n
took 150 msec to report the disc space needed for every package.
That'
On Sun,
On my Windows 10 laptop I see evidence of the operating system caching
information about recently accessed files. This makes it hard to say how
the speed might be improved. Is there a way to clear this cache?
> system.time(L1 <- size.f.pkg(R.home("library")))
user system elapsed
0.482
Dear List Members,
I tried to compute the file sizes of each installed package and the
process is terribly slow.
It took ~ 10 minutes for 512 packages / 1.6 GB total size of files.
1.) Package Sizes
system.time({
x = size.pkg(file=NULL);
})
# elapsed time: 509 s !!!
# 512 Packages
Hi
Did you try
?list.files
Cheers
Petr
> -Original Message-
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of WRAY
> NICHOLAS
> Sent: Friday, January 27, 2017 1:07 PM
> To: r-help ; r-help-request project.org>
> Subject: [R] reading file labels i
Hello R-ren I have a list of csv files in a folder which are labelled
essentially in this way (actual data has scores of files)
F010116, F020116, F030116
G020116, G030116, G040116, G 050116
H020116, H030116
where F G and H are engines I've got data from and the numbers are the dates. I
can ma
mode. See
if open="rb" is any more successful.
--
David.
Best
Iain
From: Phil Spector
To: Iain Gallagher
Cc: r-help
Sent: Thursday, 31 May 2012, 0:06
Subject: Re: [R] reading file in zip archive
Iain -
Do you see the same behaviour if yo
May 2012, 0:06
Subject: Re: [R] reading file in zip archive
Iain -
Do you see the same behaviour if you use
z <- unz(pathToZip, 'x.txt')
instead of
z <- unz(pathToZip, 'x.txt','r')
- Phil Spector
Statistical Co
ep='\t')
Error in read.table(z, header = FALSE, sep = "\t") :
seek not enabled for this connection
As I said in my previous email readLines fails as well. Rather strange really.
Anyway, as before any advice would be appreciated.
Best
Iain
_
On Wed, May 30, 2012 at 12:47 PM, Iain Gallagher
wrote:
> Hi Phil
>
> Thanks, but this still doesn't work.
>
>
> Here's a reproducible example (was wrapping my head around these functions
> before).
>
> x <- as.data.frame(cbind(rep('a',5), rep('b',5)))
> y <- as.data.frame(cbind(rep('c',5), rep('
'x.txt', 'r')
zT <- read.table(z, header=FALSE, sep='\t')
Error in read.table(z, header = FALSE, sep = "\t") :
seek not enabled for this connection
As I said in my previous email readLines fails as well. Rather strange really.
Anyway, as before an
Iain -
Once you specify the file to unzip in the call to unz, there's no
need to repeat the filename in read.table. Try:
z <- unz(pathToZip, 'goCats.txt', 'r')
zT <- read.table(z, header=TRUE, sep='\t')
(Although I can't reproduce the exact error which you saw.)
Hi List
I have a series of zip archives each containing several files. One of these
files is called goCats.txt and I would like to read it into R from the archive.
It's a simple tab delimited text file.
pathToZip <-
'/home/iain/Documents/Work/Results/bovineMacRNAData/deAnalysis/afInfection/comm
I don't know the answer to your question, but I avoid these problems by saving
my data as csv and avoiding direct interaction with Excel files. Excel is NOT a
database, even though it has supposed support through ODBC. I find this holds
true regardless of the programming environment from which I
Hi all,
I am trying to read Excel file usingthe follwoing commnad
library(RODBC)
data=odbcConnectExcel(file.choose())
sqlTables(data)
Bdat=sqlFetch(data, "test")
odbcClose(data)
head(Bdat)
1. The above script works if the Excel file is opened. If the excel file is
not
I am trying to read some file names from an specific directory and such names
contains metacharacters.
The file names is like V4.35_T01-400720.csv
In total I have 14 files for which the value T01 goes up to T14. I need to read
the files into a string vector that looks like
>names"V4.35_T01-4007
On Jun 1, 2010, at 3:19 PM, Robert Tsutakawa wrote:
I am trying to read a source program into a mac pro laptop, which
uses Snow Leopard. R is unable to find the file containing my
source program. I'm using the function source(" file name"). I
need some examples or detailed instructions
Have you set the correct working directory?
?setwd
?getwd
HTH
Stephan
Robert Tsutakawa schrieb:
I am trying to read a source program into a mac pro laptop, which uses
Snow Leopard. R is unable to find the file containing my source
program. I'm using the function source(" file name"). I n
I am trying to read a source program into a mac pro laptop, which uses
Snow Leopard. R is unable to find the file containing my source
program. I'm using the function source(" file name"). I need some
examples or detailed instructions. I have no problem reading the file
using PC.
Bob
This is an FAQ (both in the main FAQ and the rw-FAQ)
http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-do-file-names-work-in-Windows_003f
http://cran.r-project.org/bin/windows/base/rw-FAQ.html#R-can_0027t-find-my-file
You may find it easier to map your network drives: most users do.
See also ?Qu
m a given body of
data.
~ John Tukey
-Oorspronkelijk bericht-
Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
Namens Harsh
Verzonden: vrijdag 2 januari 2009 8:46
Aan: r-help@r-project.org
Onderwerp: [R] Reading file from remote location or network drive.
Hello,
Hello,
I'm trying to pull data from a network drive on a windows machine. The
location is read into a string and then used later with a data
input command.
> rem<- "\\192.192.192.3\Shared\iris1.csv"
Warning messages:
1: '\S' is an unrecognized escape in a character string
2: '\i' is an unrecogni
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