[R] to build a data.frame

[arun]

Hi,
May be this helps:
library(plyr)
 ddply(df,.(Country,Iso),summarize,NbrProj=length(Project))
#        Country Iso NbrProj
#1  Burkina Faso  BF       2
#2      Ethiopia  ET       1
#3         Ghana  GH       1
#4         Kenya  KE       2
#5    Madagascar  MG       2
#6          Mali  ML       1
#7    Mozambique  MZ       1
#8       Nigeria  NG       1
#9  South Africa  ZA       2
#10     Tanzania  TZ       2
#11     Zimbabwe  ZW       1
A.K.


A.K.




----- Original Message -----
From: Arnaud Michel <michel.arnaud at cirad.fr>
To: r-help at r-project.org
Cc: 
Sent: Wednesday, June 19, 2013 10:23 AM
Subject: [R] to build a data.frame

Hello

I have the following dataframe

df <- data.frame(
Project=c("Abaco","Abaco","Abac","Abaco","Abaco","Abaco",
"Abaco","Adaptclone","Adaptclone","Adaptclone","Adaptclone","Adaptclone",
"Adaptclone","Adopt","Adopt","Adopt"),

Country=c("Zimbabwe","Burkina Faso","South Africa","Madagascar","Tanzania",
"Mali","Mozambique","Madagascar","Ghana","Nigeria","Kenya","Burkina Faso",
  "South Africa","Tanzania","Kenya","Ethiopia" ),

Iso=c("ZW","BF","ZA","MG","TZ","ML","MZ","MG","GH","NG","KE","BF",
  "ZA","TZ","KE","ET"))

I would like to build a other dataframe with name Country
where column 1 is country,
the column 2 is number of project (in the country)
the column 3 is the code Iso (wich correspond with the country : Ex ZW 
is ISO of Zimbabwe)
       Pays        PaysIso  NbrProj
    Zimbabwe      ZW       1
  Burkina Faso    BF        2


I know associate Country and Number of projets but how associate Iso

Any idea ?
Thank you for your help

-- 
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

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