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
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