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Message-ID: <0IQZ00MANC7VUF@mail.fudan.edu.cn>
Date: 2005-12-04T15:36:45Z
From: ronggui
Subject: Construct a data.frame in a FOR-loop

>Say I have a FOR-loop for computing powers (just a trivial example)
>
>for(i in 1:5)
>{
>	x<-i^2
>	y<-i^3
>}
>
>How can I create a data.frame 
> x<-numeric(5)
> y<-numeric(5)
> for(i in 1:5)
+ {
+ x[i]<-i^2
+ y[i]<-i^3
+ }
> da<-data.frame(index=1:5,x=x,y=y)
> da
  index  x   y
1     1  1   1
2     2  4   8
3     3  9  27
4     4 16  64
5     5 25 125

these can get the data frame.

>and a 3D plot of (i,x(i),y(i)), i.e. for 
>each iteration
>
>Thanks,
>Serguei Kaniovski
>-- 
>___________________________________________________________________
>
>Österreichisches Institut für Wirtschaftsforschung (WIFO)
>
>Name: Serguei Kaniovski                 Postadresse: Postfach  91
>Tel.: +43-1-7982601-231                 A-1103  Wien
>Fax : +43-1-7989386                     Standort: Arsenal Objekt 20 
>
>Mail: Serguei.Kaniovski at wifo.ac.at      A-1030  Wien
>
>http://www.wifo.ac.at/
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

= = = = = = = = = = = = = = = = = = = =
			


 

2005-12-04

------
Deparment of Sociology
Fudan University

My new mail addres is ronggui.huang at gmail.com
Blog:http://sociology.yculblog.com