[R] Questions about generating samples in R

[Christian Schulz]

split <- sample(2,nrow(dataframe),replace=T,prob=c(0.04,0.96))

dataframe[split==1,]  # 200
dataframe[split==2,] # 4800

regards, christian

> ?sample should tell you what you need to know.
>
> On 26/11/06, Alexander Geisler <alexander.geisler at gmail.com> wrote:
>   
>> Hello!
>>
>> I have a data set with 8 columns and in about 5000 rows. What I want to
>> do is to generate samples of this data set.
>>
>> Samples of a special size, as example 200.
>>
>> What is the easiest way to do this? No special things are needed, only
>> the random selection of 200 rows of the data set.
>>
>> Thanks
>> Alex
>>
>> --
>> Alexander Geisler * Kaltenbach 151 * A-6272 Kaltenbach
>> email: alexander.geisler at gmx.at | alexander.geisler at gmail.com
>> phone: +43 650 / 811 61 90 | skpye: al1405ex
>>
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>>
>>     
>
>
>