[R] macro in a loop

Pankaj Chopra pchopra at ncsu.edu
Sat Mar 21 21:23:21 CET 2009


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
>
> ______________________________________________
> 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.
>




More information about the R-help mailing list