[R] how to read a df like that and transform it?

[arun]

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.1988 at gmail.com>
To: R help <r-help at 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.1988 at gmail.com
——————————————————————————

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