[R] deleteing all but some observations in data.frame

[Erik Iverson]

It depends on which 20 you want.

If you have a data.frame called 'test.df', you can do:

#first 20
test.df[20, ]

-or-

head(test.df, 20)

#random 20
test.df[sample(nrow(test.df), 20), ]

None of this was tested, but it should be a start.

--Erik

Matevž Pavlič wrote:
> Hi, 
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>  
> 
> I am sure that can be done in R....
> 
> How would i delete all but let say 20 observations in data.frame?
> 
>  
> 
> Thank you, M
> 
>  
> 
>  
> 
> 
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