R: How to access the elements of a list in a loop -


i have 2 files. 1 file contains information genes. looks this.

query|       gene |  desc apeco1_1380 | flda   | flavodoxin flda apeco1_2545 | fpr    |ferredoxin-nadp reductase apeco1_3632  |fldb   | flavodoxin fldb apeco1_1465  |fepa   | ferrienterobactin receptor apeco1_4396 | cira   | colicin receptor

the second files contains list of genecodes.

apeco1_1380 apeco1_2545 apeco1_3632

i'm trying extract gene information file 1 gene codes in file 2. below code i'm using. 

#files gene data genecodes(file 1)      datat = read.csv("d://sbmlexploration/genes/genenames.csv",header = true)  #has second type of files (files genecode) - file 2  filelist = list.files("d://sbmlexploration/genes/test1")  df = data.frame(monkcode = character(), genename = character(),                  description = character(), stringsasfactors = f)  for(i in 1:length(filelist)) {   currentgenes = read.csv(filelist[i],header = t)    for(j in 1:nrow(currentgenes))   {     curentrow = subset(datat,datat$query == currentgenes[j,1])      df<-rbind(df,data.frame(monkcode = currentrow$query,                             genename = currentrow$gene,                             description = currentrow$desc))   }   write.table(df,filename,sep=",",row.names = f)   df = null  }

my problem when provide gencode currentgenes[j,1] query returns 0 rows. when give code string (with in apeco1_1465) returns record. issue way i'm referring list. can please me this?

simply transform currentgenes[j,1] string using as.character().

i.e.as.character(currentgenes[j,1])


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