[R] repeat a function

[Michael Bedward]

Hi Michael

testdat <- replicate( 50, growth[ sample(nrow(growth), 8, rep=TRUE) ] )

testdat will then be a matrix of 8 x 50 = 400 rows where each lot of 8
is a sample.

Alternatively you can do...
testdat <- replicate( 50, growth[ sample(nrow(growth), 8, rep=TRUE) ],
simplify=FALSE )

Now testdat will be a list of 50 elements, each of which is a sample matrix

Michael

On 29 September 2010 13:49, Michael Larkin <mlarkin at rsmas.miami.edu> wrote:
> I have R randomly sampling my array made up of 2 columns of data.  Here is
> my code randomly sampling 5 different rows from my dataset to create a new
> dataset of 8 rows of data:
>
>
>
> testdat<-growth[sample(5,8,replace=T),]
>
>
>
> Now I want to tell R to repeat this function 50 times and give me the
> output.  I have been searching the internet and have been unable to figure
> this out.  Any advice would be greatly appreciated.
>
>
>
> Mike
>
>
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