[R] How to sample database

[kjetil halvorsen]

Hola!

Suppose your data base is a data.frame:

ind <- sample(1:2400, 90)
random.sample <- your.data.frame[ind, ]

Kjetil Halvorsen

Bernardo Rangel Tura wrote:
> 
> Dear R-masters!
> 
> I have a database with 2400 patients and I need make a sample with 90 subjects.
> How to I make a random sample in this data base with R?
> 
> Thanks in advance
> 
> Bernardo Rangel Tura, MD, MSc
> National Institute of Cardiology Laranjeiras
> Rio de Janeiro Brazil
> 
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