On Wed, Jul 14, 2010 at 10:24 AM, Federico Andreis
<federico.andr...@gmail.com> wrote:
> I guess you could just use as an argument to sample
>
> data[,-c(1,2)]
>
> where 1 and 2 are id and pID50 column number
or if you do not know them and do not want to find out:
sample(data[ , - match(c("id", "x3"), names(data))], 3, replace=FALSE)
>
> On Wed, Jul 14, 2010 at 7:17 PM, Addi Wei <addi...@gmail.com> wrote:
>
>>
>> id pID50 apol a_acc a_acid a_aro a_base a_count
>> 1 mol.11 3.63 -0.882267 -0.527967 -0.298197 -1.032380 0 -1.063410
>> 2 mol.14 3.38 -1.007330 -0.527967 -0.298197 -1.032380 0 -1.063410
>> 3 mol.19 3.18 1.153560 1.407910 -0.298197 1.254100 0 1.160080
>> 4 mol.20 3.14 0.183448 -0.527967 -0.298197 0.873019 0 0.290021
>> 5 mol.29 2.77 -0.273901 -0.527967 -0.298197 0.110860 0 -0.193347
>> 6 mol.30 2.74 -0.230593 -0.527967 -0.298197 0.110860 0 0.000000
>> 7 mol.40 2.16 -1.117550 -0.527967 -0.298197 -1.032380 0 -1.256760
>> 8 mol.45 1.90 -0.383560 -0.527967 -0.298197 0.110860 0 -0.290021
>> 9 mol.48 1.73 -0.383560 -0.527967 -0.298197 0.110860 0 -0.290021
>>
>>
>> What if I want to exclude 2 columns?
>> For example: sample(data, 3, replace=FALSE) ##from my sample, i want
>> to exclude both id and pID50
>>
>> Thanks much.
>> --
>> View this message in context:
>> http://r.789695.n4.nabble.com/Want-to-exclude-a-column-when-using-sample-function-tp2287988p2289092.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>
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>
> ______________________________________________
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>
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/
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