Apologies I was trying to simplify the programme and missed out four input files. The files on Andrew, Burt, Charlie and Dave have the same format of one factor and 13 numeric variables with repeated measurements eg. Study v1 v2 v3 v4 v5 v6 v7 v8 v9 v10 v11 v12 v13 A 153 4.0 2.00 2.00 145.00 0.67 0.01 49.00 0.34 0.04 0.96 -3.24 0.04 B 96 33 3.0 13.0 47.0 0.9 0.2 4.2 0.1 0.5 0.5 -0.7 -0.7
Inp_dat is Case r p SE n Andrew 0.03 0.01 0.0004 500 Burt 0.08 0.111 0.04 50 Charlie 0.04 0.022 0.0005 200 Dave 0.2 0.028 0.006 85 out_put starts as empty data frame and rows are added incrementally one for Andrew, one for Burt etc. If the code is Andrew<-read.csv("/File /Andrew.csv") Burt<-read.csv("/File /Burt.csv") Charlie<-read.csv("/File /Charlie.csv") Dave<-read.csv("/File /Dave.csv") Inp_dat<- read.csv("/File/Input data.csv") out_put<-data.frame(Case=character(), StdL=numeric(), StdPP=numeric(), StdSE=numeric(), L=numeric(), MRPP=numeric(), MRSE=numeric(), stringsAsFactors=FALSE) for(i in 1:4) { if (i==1) b<-Andrew if (i==2) b<-Burt if (i==3) b<-Charlie if (i==4) b<-Dave pr <- Inp_dat$p[i] SE_pr <- Inp_dat$SE[i] r<- Inp_dat$r[i] n<- Inp_dat$n[i] Case<- Inp_dat$Case[i] … out_put[i,]<-data.frame(Case, stdL, stdPP, stdSE, L, PP, PP_SE) } out_put Case StdL StdPP StdSE L MRPP MRSE 1 1 19.466823 0.16432300 0.03137456 26.002294 0.2080145 0.03804692 2 2 2.334130 0.22566939 0.08962662 5.095703 0.3888451 0.08399101 3 3 2.588678 0.05502765 0.00454159 42.058326 0.4861511 0.02128030 4 4 7.857898 0.18457822 0.04372297 4.705487 0.1193687 0.01921609 The Cases are labelled as integers 1 corresponding to Andrew, 2 corresponding to Burt etc. instead of the intended text labels Andrew, Burt, Charlie and Dave. Note all other columns are correct. Furthermore str(Case) Factor w/ 4 levels "Andrew","Burt",..: 4 str(out_put) 'data.frame': 4 obs. of 7 variables: $ Case : chr "1" "2" "3" "4" $ StdL : num 19.47 2.33 2.59 7.86 etc I have tried changing the line Case<- Inp_dat$Case[i] to Case<- levels(Inp_dat$Case)[i] and this gives the following output Case StdL StdPP StdSE L MRPP MRSE 1 1 19.466823 0.16432300 0.03137456 26.002294 0.2080145 0.03804692 2 1 2.334130 0.22566939 0.08962662 5.095703 0.3888451 0.08399101 3 1 2.588678 0.05502765 0.00454159 42.058326 0.4861511 0.02128030 4 1 7.857898 0.18457822 0.04372297 4.705487 0.1193687 0.01921609 str(Case) chr "Dave" and str(out_put) 'data.frame': 4 obs. of 7 variables: $ Case : chr "1" "1" "1" "1" $ StdL : num 19.47 2.33 2.59 7.86 etc I’ve also tried adding, as suggested the stringsAsFactors=FALSE to the Inp_dat<- read.csv("/File/Input data.csv", stringsAsFactors=FALSE) This gives the same as the 2nd output above. -- View this message in context: http://r.789695.n4.nabble.com/Dataframes-and-text-identifier-columns-tp4693184p4693389.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@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.