[R] reading in multiple data sets in 2 loops

Jim Lemon
2016-02-06T09:44:54Z

Hi Reka,
Try this:

header<-"C:/Research3/simulation1/second_gen/pheno_
1000ind_4000m_add_h70_prog"
for(index1 in 1:2) {
 for(index2 in 2:3)

read.csv(paste(paste(header,index1,index2,sep="_"),".csv",sep=""))
}

Jim

On Sat, Feb 6, 2016 at 4:53 PM, Reka Howard <howardr at iastate.edu>
wrote:

> Hello,
> I have over 1000 csv data sets I need to read into R, so I want to read
> them in using a loop. The data sets are named as
> pheno_1000ind_4000m_add_h70_prog_1_2.csv,
> pheno_1000ind_4000m_add_h70_prog_1_3.csv, ... so I need 2 loops (for the
> last 2 numbers in the names). What I would like to do is the following:
>
> setwd("C:/Research3/simulation1/second_gen")
> d1<-read.csv("pheno_1000ind_4000m_add_h70_prog_1_2.csv")
> d2<-read.csv("pheno_1000ind_4000m_add_h70_prog_1_3.csv")
> d3<-read.csv("pheno_1000ind_4000m_add_h70_prog_2_3.csv")
> .
> .
> .
>
> I am wondering how I can accomplish this with a loop. Any suggestion is
> appreciated!
> I tried the following but it does not work:
>
> data <- lapply(
>
>
paste(("C:/Research3/simulation1/second_gen/pheno_1000ind_4000m_add_h70_prog_",[1:2],"_",[2:3],".csv",sep=''),
> read.csv, header=TRUE, sep=',' )
> names(data) <- paste("d", LETTERS[1:3], sep='')
>
> Thanks!
> Reka
>
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