[R] to build a data.frame

[David Carlson]

Try this:

> aggregate(Project~Country+Iso, df, length)
        Country Iso Project
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      Tanzania  TZ       2
10 South Africa  ZA       2
11     Zimbabwe  ZW       1

Or if you prefer left-aligned:

> print(aggregate(Project~Country+Iso, df, length), right=FALSE)
   Country      Iso Project
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  Tanzania     TZ  2      
10 South Africa ZA  2      
11 Zimbabwe     ZW  1      

-------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77840-4352

-----Original Message-----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org] On Behalf Of Arnaud Michel
Sent: Wednesday, June 19, 2013 9:23 AM
To: r-help at r-project.org
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","Adaptcl
one",
"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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