R help - Nov 2011 - Putting directory path as a parameter

Hi List,

I am new to R, this may be simple. 

I want to store directory path as parameter which in turn to be used while
reading and writing data from csv files.

How I can use dir defined  in the below mentioned example while reading the
csv file.

Example:
dir <- "C:/Users/Desktop" #location of file

temp_data <- read.csv("dir/bs_dev_segment_file.csv")

If I run this it will show errors:

Error in file(file, "rt") : cannot open the connection
In addition: Warning message:
In file(file, "rt") :
  cannot open file 'dir/bs_dev_segment_file.csv': No such file or
directory

Regards,
-Ajit

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Hi Aajit,

try using the ?paste function to combine the variable with your
directly and the filename into one string, and then pass that to
read.csv() or whatever

paste(dir, "/bs_dev_segment_file.csv", sep = '')

HTH,

Josh

On Tue, Nov 15, 2011 at 6:12 AM, aajit75 <aajit75 at yahoo.co.in>
wrote:
> Hi List,
>
> I am new to R, this may be simple.
>
> I want to store directory path as parameter which in turn to be used while
> reading and writing data from csv files.
>
> How I can use dir defined ?in the below mentioned example while reading the
> csv file.
>
> Example:
> dir <- "C:/Users/Desktop" #location of file
>
> temp_data <- read.csv("dir/bs_dev_segment_file.csv")
>
> If I run this it will show errors:
>
> Error in file(file, "rt") : cannot open the connection
> In addition: Warning message:
> In file(file, "rt") :
> ?cannot open file 'dir/bs_dev_segment_file.csv': No such file or
directory
>
> Regards,
> -Ajit
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Putting-directory-path-as-a-parameter-tp4043092p4043092.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>


-- 
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, ATS Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/

Try pasting them together like

paste(dir, "...")

You may need to use the collapse argument. Alternatively, change your working
directory to dir with setwd().

M

On Nov 15, 2011, at 9:12 AM, aajit75 <aajit75 at yahoo.co.in> wrote:
> Hi List,
> 
> I am new to R, this may be simple. 
> 
> I want to store directory path as parameter which in turn to be used while
> reading and writing data from csv files.
> 
> How I can use dir defined  in the below mentioned example while reading the
> csv file.
> 
> Example:
> dir <- "C:/Users/Desktop" #location of file
> 
> temp_data <- read.csv("dir/bs_dev_segment_file.csv")
> 
> If I run this it will show errors:
> 
> Error in file(file, "rt") : cannot open the connection
> In addition: Warning message:
> In file(file, "rt") :
>  cannot open file 'dir/bs_dev_segment_file.csv': No such file or
directory
> 
> Regards,
> -Ajit
> 
> --
> View this message in context:
http://r.789695.n4.nabble.com/Putting-directory-path-as-a-parameter-tp4043092p4043092.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> ______________________________________________
> 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.