R help - Dec 2009 - Reading Input file

Dear R helpers
 
I have some files in my say 'WORK' directory and the file names are say
rate1.csv, rate2.csv, rate3.csv, rate4.csv
 
Because of some other requirement, I need to run the following commands
 
n = 4  
 
rates = NULL
 
for (i in 1:n)

rates[i] = (paste(`rate', i, ‘.csv`, sep = ‘’))
 
# this gives me "rate1.csv" "rate2.csv" and so on 
 
#My problem is now I need to relate these file names with actual files and read
these files
# There are files rate1.csv, rate2.csv, rate3.csv, rate4.csv in my WORK
directory.
 
 
# If I individually define 
 
PPP = read.csv(‘rate[1]’) 
PPP      # When I run PPP in R, it gives contents of the file rate1.csv i.e. I
am able to read the required rate1 file. But if I run following commands, I get
errors.
  
newrate = NULL 
  
for (i in 1:n) 
   {
    newrate[i] = read.csv(rates[i]) 
   } 
  
I need to read all these four files for my further analysis. Please guide. 
  
  
Regards 
  
Maithili 
  
 


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On Sat, Dec 26, 2009 at 10:21 AM, Maithili Shiva
<maithili_shiva@yahoo.com>wrote:
>
>
> Dear R helpers
>
> I have some files in my say 'WORK' directory and the file names are
say
> rate1.csv, rate2.csv, rate3.csv, rate4.csv
>
> Because of some other requirement, I need to run the following commands
>
> n = 4
>
> rates = NULL
>
> for (i in 1:n)
>
> rates[i] = (paste(`rate', i, ‘.csv`, sep = ‘’))
>
> # this gives me "rate1.csv" "rate2.csv" and so on
>
> #My problem is now I need to relate these file names with actual files and
> read these files
> # There are files rate1.csv, rate2.csv, rate3.csv, rate4.csv in my WORK
> directory.
>
>
> # If I individually define
>
> PPP = read.csv(‘rate[1]’)
> PPP      # When I run PPP in R, it gives contents of the file rate1.csv
> i.e. I am able to read the required rate1 file. But if I run following
> commands, I get errors.
>
> newrate = NULL
>
>
Maybe try:

newrate <- list()

and leave everything else as it is.

just an idea,


> for (i in 1:n)
>    {
>     newrate[i] = read.csv(rates[i])
>    }
>
> I need to read all these four files for my further analysis. Please guide.
>
>
> Regards
>
> Maithili
>
>
>
>
>      The INTERNET now has a personality. YOURS! See your Yahoo! Homepage.
>        [[alternative HTML version deleted]]
>
>
> ______________________________________________
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>
>
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