[R] macro in a loop

Le Wang ruser.le at gmail.com
Sun Mar 22 03:37:30 CET 2009


Thank you all for the help!

Le

On Sat, Mar 21, 2009 at 4:23 PM, Pankaj Chopra <pchopra at ncsu.edu> wrote:
> data.year[j] <-
> read.table(paste("c:/data/",year[j],".csv",sep=''),header=T,sep=",")
>
>
> should do it.
>
>
>
> Le Wang wrote:
>>
>> Hi there,
>>
>> Thanks for your time in advance.
>>
>> I am trying to read in multiple files. For example,
>>
>>  data.1940 <- read.table("c:/data/1940.csv",header=TRUE,sep=",")
>>  data.1950 <- read.table("c:/data/1950.csv",header=TRUE,sep=",")
>>  data.1960 <- read.table("c:/data/1960.csv",header=TRUE,sep=",")
>>
>> How can I write a loop to read the data? I was trying to use the following
>>
>>        year<-c(1940,1950,1960)
>>
>>        for (j in 1:3){
>>
>>                      data.year[j] <- read.table("c:/data/year[j]
>> .csv",header=TRUE,sep=",")
>>
>>        }
>>
>> But it is obviously wrong, as the marco is not proctected.
>>
>> I have been googling around for a while but haven't succeeded in
>> finding any solutions. Thanks again for your help.
>>
>> Le
>>
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>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>




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