Hi, May be this helps:
df1<-read.table(text=" father,mother,num_daughter,daughter 291,3906,0, 275,4219,0, 273, 4236,1,49410 281,4163,1,49408 274, 4226,1,49406 295, 3869,2,49403 295,3869,2,49404 287,4113,0, 295, 3871,1,49401 292, 3895,4,49396 292,3895,4, 49397 292,3895,4,49398 292,3895,4,49399 291, 3900,3,49392 291, 3900,3, 291, 3900,3, ",sep=",",header=TRUE,stringsAsFactors=F,na.strings="") df1$num_daughter[df1$num_daughter>1]<-ave(df1$num_daughter[df1$num_daughter>1],df1$num_daughter[df1$num_daughter>1],FUN=seq_along) reshape(df1,v.names="daughter",idvar=c("father","mother"),timevar="num_daughter",direction="wide") # father mother daughter.0 daughter.1 daughter.2 daughter.3 daughter.4 #1 291 3906 NA NA NA NA NA #2 275 4219 NA NA NA NA NA #3 273 4236 NA 49410 NA NA NA #4 281 4163 NA 49408 NA NA NA #5 274 4226 NA 49406 NA NA NA #6 295 3869 NA 49403 49404 NA NA #8 287 4113 NA NA NA NA NA #9 295 3871 NA 49401 NA NA NA #10 292 3895 NA 49396 49397 49398 49399 #14 291 3900 NA 49392 NA NA NA A.K. ----- Original Message ----- From: Yao He <yao.h.1...@gmail.com> To: R help <r-help@r-project.org> Cc: Sent: Wednesday, January 23, 2013 7:42 AM Subject: [R] how to read a df like that and transform it? Dear all I have a data.frame like that : father mother num_daughter daughter 291 3906 0 NULL 275 4219 0 NULL 273 4236 1 49410 281 4163 1 49408 274 4226 1 49406 295 3869 2 49403 49404 287 4113 0 NULL 295 3871 1 49401 292 3895 4 49396 49397 49398 49399 291 3900 3 49392 How to read it into R and transform it like that: father mother num_daughter daughter1 daughter2 daughter3 daughter4 291 3906 0 NULL 275 4219 0 NULL 273 4236 1 49410 281 4163 1 49408 274 4226 1 49406 295 3869 2 49403 49404 287 4113 0 NULL 295 3871 1 49401 292 3895 4 49396 49397 49398 49399 291 3900 3 49392 library (plyr) and library (reshape2) and other good packages are OK for me. Thanks a lot! Yao He ————————————————————————— Master candidate in 2rd year Department of Animal genetics & breeding Room 436,College of Animial Science&Technology, China Agriculture University,Beijing,100193 E-mail: yao.h.1...@gmail.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. ______________________________________________ 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.