[R] Random number generation

[Max]

This is perfect, thanks! :)

Jorge Ivan Velez pretended :
> Hi Max,
>
> See ?write.table.  Perhaps:
>
> MAT <- matrix(runif(10000 * 6), 10000, 6)
>
> # TXT format
> write.table(MAT,
> "C:/yourmatrix.txt",col.names=FALSE,row.names=FALSE,quote=FALSE)
>
> # XLS format
> write.table(MAT,
> "C:/yourmatrix.xls",col.names=FALSE,row.names=FALSE,quote=FALSE,sep="\t")
>
> HTH,
>
> Jorge
>
>
>
> On Thu, Jul 31, 2008 at 1:53 PM, Max <mnevill at exitcheck.net> wrote:
>
>> Marc,
>> 
>> this is very handy. My next question is, do you know a quick and easy way
>> to transfer all of the output to a txt file? (or .xls)?
>> 
>> Thanks,
>> 
>> -Max
>> 
>> 
>> Marc Schwartz explained on 07/31/2008 :
>> 
>>  on 07/31/2008 12:24 PM Max wrote:
>>> 
>>>> Hi Everyone,
>>>> 
>>>> I did a quick search of the list and it looks like this may not have been
>>>> asked before... I'm trying to generate a matrix of random numbers between 
>>>> 0 and 1, with 6 columns, 10000 rows. About all I know is that runif(1) 
>>>> gives me the random number I'm looking for.
>>>> 
>>>> Any help would be great!
>>>> 
>>>> thanks,
>>>> 
>>> 
>>> MAT <- matrix(runif(10000 * 6), 10000, 6)
>>> 
>>>  > str(MAT)
>>>  num [1:10000, 1:6] 0.753 0.600 0.806 0.713 0.796 ...
>>> 
>>>  > head(MAT, 10)
>>>             [,1]      [,2]       [,3]       [,4]       [,5]       [,6]
>>>  [1,] 0.75343430 0.4993896 0.68554749 0.01924549 0.90579982 0.99606191
>>>  [2,] 0.59957219 0.4075650 0.57851744 0.97208426 0.32137505 0.02089689
>>>  [3,] 0.80567935 0.5746030 0.16520072 0.92615138 0.01628994 0.90075333
>>>  [4,] 0.71270574 0.3252210 0.53765089 0.58930899 0.03053356 0.23282879
>>>  [5,] 0.79603691 0.5591622 0.97308348 0.52744458 0.76403708 0.22268021
>>>  [6,] 0.49624259 0.5106604 0.06687444 0.48659150 0.29803454 0.91760758
>>>  [7,] 0.32921909 0.7784539 0.20468873 0.86730697 0.42581735 0.59344279
>>>  [8,] 0.93646405 0.4819996 0.79033546 0.68441917 0.28566573 0.97244395
>>>  [9,] 0.02964297 0.5489500 0.64355067 0.87131530 0.58505804 0.06972828
>>> [10,] 0.55956266 0.8376349 0.11850374 0.37687892 0.71220844 0.97784727
>>> 
>>> 
>>> 
>>> The first argument to runif() is how many random deviates you want to
>>> generate. If you need to be able to reproduce the exact sequence again in
>>> the future, see ?set.seed.
>>> 
>>> HTH,
>>> 
>>> Marc Schwartz
>>> 
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>> 
>> 
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>> 
>
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>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.