Hello,
with a data.frame like this :
> toto <-
data.frame(id=c("id1","id1","id2","id3","id3","id3"),dpt=c("13","13","34","30","30","30"))
> toto
id dpt
1 id1 13
2 id1 13
3 id2 34
4 id3 30
5 id3 30
6 id3 30
what is the most efficient ways to obtain :
id dpt
1 id1 13
2 id2 34
3 id3 30
?
thanks in advance for your reply
Bruno
Si vous n'etes pas destinataires de ce message, merci d'avertir l'expediteur de
l'erreur de distribution et de le detruire immediatement.
Ce message contient des informations confidentielles ou appartenant a La
Francaise des Jeux. Il est etabli a l'intention exclusive de ses destinataires.
Toute divulgation, utilisation, diffusion ou reproduction (totale ou partielle)
de ce message ou des informations qu'il contient, doit etre prealablement
autorisee.
Tout message electronique est susceptible d'alteration et son integrite ne peut
etre assuree. La Francaise des Jeux decline toute responsabilite au titre de ce
message s'il a ete modifie ou falsifie.
If you are not the intended recipient of this e-mail, please notify the sender
of the wrong delivery and delete it immediately from your system.
This e-mail contains confidential information or information belonging to La
Francaise des Jeux and is intended solely for the addressees. The unauthorised
disclosure, use, dissemination or copying (either whole or partial) of this
e-mail, or any information it contains, is prohibited.
E-mails are susceptible to alteration and their integrity cannot be guaranteed.
La Francaise des Jeux shall not be liable for this e-mail if modified or
falsified.
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
