[R] How to add some of data in the first place dataset

[Arne Henningsen]

If you want to add rows to a data frame using rbind, your additional rows must 
be in a data frame with the same (column) names.

R> data( iris )
R> a <- data.frame( Sepal.Length=c(1:4), Sepal.Width=c(2:5), 
  Petal.Length=c(3:6), Petal.Width=c(4:7), Species=rep("rosa",4))
R> b <- iris[1:10,]
R> rbind(a,b)
   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1           1.0         2.0          3.0         4.0    rosa
2           2.0         3.0          4.0         5.0    rosa
3           3.0         4.0          5.0         6.0    rosa
4           4.0         5.0          6.0         7.0    rosa
11          5.1         3.5          1.4         0.2  setosa
21          4.9         3.0          1.4         0.2  setosa
31          4.7         3.2          1.3         0.2  setosa
41          4.6         3.1          1.5         0.2  setosa
5           5.0         3.6          1.4         0.2  setosa
6           5.4         3.9          1.7         0.4  setosa
7           4.6         3.4          1.4         0.3  setosa
8           5.0         3.4          1.5         0.2  setosa
9           4.4         2.9          1.4         0.2  setosa
10          4.9         3.1          1.5         0.1  setosa


Arne

On Wednesday 27 April 2005 15:48, Muhammad Subianto wrote:
> Dear R-help,
>  First I apologize if my question is quite simple.
>  I need add some of data in the first place my dataset, how can I do that.
>  I have tried with rbind, but I did not succes.
>    0.1         3.6          0.4         0.9  rose
>    4.1         4.0          1.2         1.2  rose
>    4.4         3.2          1.9         0.5  rose
>    4.6         1.1          1.1         0.2  rose
>  For example,
>
>  > data(iris)
>  > iris[1:10,]
>
>     Sepal.Length Sepal.Width Petal.Length Petal.Width Species
>  1           5.1         3.5          1.4         0.2  setosa
>  2           4.9         3.0          1.4         0.2  setosa
>  3           4.7         3.2          1.3         0.2  setosa
>  4           4.6         3.1          1.5         0.2  setosa
>  5           5.0         3.6          1.4         0.2  setosa
>  6           5.4         3.9          1.7         0.4  setosa
>  7           4.6         3.4          1.4         0.3  setosa
>  8           5.0         3.4          1.5         0.2  setosa
>  9           4.4         2.9          1.4         0.2  setosa
>  10          4.9         3.1          1.5         0.1  setosa
>
>  The result something like this,
>
>    0.1         3.6          0.4         0.9  rose
>    4.1         4.0          1.2         1.2  rose
>    4.4         3.2          1.9         0.5  rose
>    4.6         1.1          1.1         0.2  rose
>    5.1         3.5          1.4         0.2  setosa
>    4.9         3.0          1.4         0.2  setosa
>    4.7         3.2          1.3         0.2  setosa
>    4.6         3.1          1.5         0.2  setosa
>    5.0         3.6          1.4         0.2  setosa
>    5.4         3.9          1.7         0.4  setosa
>    4.6         3.4          1.4         0.3  setosa
>    5.0         3.4          1.5         0.2  setosa
>    4.4         2.9          1.4         0.2  setosa
>    4.9         3.1          1.5         0.1  setosa
>
>  Sincerely,
>  Muhammad Subianto
>
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-- 
Arne Henningsen
Department of Agricultural Economics
University of Kiel
Olshausenstr. 40
D-24098 Kiel (Germany)
Tel: +49-431-880 4445
Fax: +49-431-880 1397
ahenningsen at agric-econ.uni-kiel.de
http://www.uni-kiel.de/agrarpol/ahenningsen/