[R] Change values in a dateframe

[arun]

Hi Michel,
You could try:


df1New<-droplevels(TEST[with(TEST,ave(seq_along(Matricule),Matricule,FUN=min)),])
row.names(df1New)<-1:nrow(df1New)
df2New<-droplevels(TEST[with(TEST,ave(seq_along(Matricule),Matricule,FUN=max)),])
row.names(df2New)<-1:nrow(df2New)
 identical(df1New,df1)
#[1] TRUE
 identical(df2New,df2)
#[1] TRUE
A.K.



----- Original Message -----
From: Arnaud Michel <michel.arnaud at cirad.fr>
To: R help <r-help at r-project.org>
Cc: 
Sent: Wednesday, July 24, 2013 2:39 AM
Subject: [R] Change values in a dateframe

Hello

I have the following problem :
The dataframe TEST has multiple lines for a same person because :
there are differents values of Nom or differents values of Prenom
but the values of Matricule or Sexe or Date.de.naissance are the same.

TEST <- structure(list(Matricule = c(66L, 67L, 67L, 68L, 89L, 90L, 90L,
91L, 108L, 108L, 108L), Nom = structure(c(1L, 2L, 2L, 4L, 8L,
5L, 6L, 9L, 3L, 3L, 7L), .Label = c("CHICHE", "GEOF", "GUTIER",
"JACQUE", "LANGUE", "LANGUE-LOPEZ", "RIVIER", "TRU", "VINCENT"
), class = "factor"), Prenom = structure(c(8L, 3L, 4L, 5L, 1L,
2L, 2L, 9L, 6L, 7L, 7L), .Label = c("Edgar", "Elodie", "Jeanine",
"Jeannine", "Michel", "Michele", "Michèle", "Michelle", "Victor"
), class = "factor"), Sexe = structure(c(1L, 1L, 1L, 2L, 2L,
1L, 1L, 2L, 1L, 1L, 1L), .Label = c("Féminin", "Masculin"), class = 
"factor"),
     Date.de.naissance = structure(c(4L, 2L, 2L, 7L, 6L, 5L, 5L,
     1L, 3L, 3L, 3L), .Label = c("03/09/1940", "04/03/1946", "07/12/1947",
     "18/11/1945", "27/09/1947", "29/12/1936", "30/03/1935"), class = 
"factor")), .Names = c("Matricule",
"Nom", "Prenom", "Sexe", "Date.de.naissance"), class = "data.frame", 
row.names = c(NA,
-11L))


I would want to make homogeneous the information and would like built 2 
dataframes :
df1 wich has the value of Nom and Prenom of the first lines of TEST when 
there are different values. The other values (Matricule or Sexe or 
Date.de.naissance) are unchanged

df1 <- structure(list(Matricule = c(66L, 67L, 67L, 68L, 89L, 90L, 90L,
91L, 108L, 108L, 108L), Nom = structure(c(1L, 2L, 2L, 4L, 6L,
5L, 5L, 7L, 3L, 3L, 3L), .Label = c("CHICHE", "GEOF", "GUTIER",
"JACQUE", "LANGUE", "TRU", "VINCENT"), class = "factor"), Prenom = 
structure(c(6L,
3L, 3L, 4L, 1L, 2L, 2L, 7L, 5L, 5L, 5L), .Label = c("Edgar",
"Elodie", "Jeanine", "Michel", "Michele", "Michelle", "Victor"
), class = "factor"), Sexe = structure(c(1L, 1L, 1L, 2L, 2L,
1L, 1L, 2L, 1L, 1L, 1L), .Label = c("Féminin", "Masculin"), class = 
"factor"),
     Date.de.naissance = structure(c(4L, 2L, 2L, 7L, 6L, 5L, 5L,
     1L, 3L, 3L, 3L), .Label = c("03/09/1940", "04/03/1946", "07/12/1947",
     "18/11/1945", "27/09/1947", "29/12/1936", "30/03/1935"), class = 
"factor")), .Names = c("Matricule",
"Nom", "Prenom", "Sexe", "Date.de.naissance"), class = "data.frame", 
row.names = c(NA,
-11L))

df2 wich has the value of Nom and Prenom of the last lines of TEST when 
there are different values. The other values (Matricule or Sexe or 
Date.de.naissance) are unchanged.

df2 <- structure(list(Matricule = c(66L, 67L, 67L, 68L, 89L, 90L, 90L,
91L, 108L, 108L, 108L), Nom = structure(c(1L, 2L, 2L, 3L, 6L,
4L, 4L, 7L, 5L, 5L, 5L), .Label = c("CHICHE", "GEOF", "JACQUE",
"LANGUE-LOPEZ", "RIVIER", "TRU", "VINCENT"), class = "factor"),
     Prenom = structure(c(6L, 3L, 3L, 4L, 1L, 2L, 2L, 7L, 5L,
     5L, 5L), .Label = c("Edgar", "Elodie", "Jeannine", "Michel",
     "Michèle", "Michelle", "Victor"), class = "factor"), Sexe = 
structure(c(1L,
     1L, 1L, 2L, 2L, 1L, 1L, 2L, 1L, 1L, 1L), .Label = c("Féminin",
     "Masculin"), class = "factor"), Date.de.naissance = structure(c(4L,
     2L, 2L, 7L, 6L, 5L, 5L, 1L, 3L, 3L, 3L), .Label = c("03/09/1940",
     "04/03/1946", "07/12/1947", "18/11/1945", "27/09/1947", "29/12/1936",
     "30/03/1935"), class = "factor")), .Names = c("Matricule",
"Nom", "Prenom", "Sexe", "Date.de.naissance"), class = "data.frame", 
row.names = c(NA,
-11L))

Thank for your helps
Michel

-- 
Michel ARNAUD
Chargé de mission auprès du DRH
DGDRD-Drh - TA 174/04
Av Agropolis 34398 Montpellier cedex 5
tel : 04.67.61.75.38
fax : 04.67.61.57.87
port: 06.47.43.55.31

______________________________________________
R-help at 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.