[R] generating RANDOM ROWS from matrix

[Doran, Harold]

Is something like this what your looking for:

x   <- matrix(c(rnorm(100)),ncol=10)
sub <- sample(5, replace=TRUE) # For sampling with replacement
x[sub,]

Harold

 

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of mark salsburg
Sent: Wednesday, March 15, 2006 4:02 PM
To: R-help at stat.math.ethz.ch
Subject: [R] generating RANDOM ROWS from matrix

Dear group,

I would like to generate a 1000 random rows from a MATRIX with
dimensions 12,000 by 20 (i.e. to generate a 1000 by 20 matrix of random
rows)

Does the function sample() work for this???

thank you in advance

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