[Wellington-pm] Select at random from a list
philip at xinqu.net
Wed Jul 19 19:24:43 PDT 2006
We haven't flogged my simple script to death yet. One more data point.
On Sat, 15 Jul 2006, Jacinta Richardson wrote:
> When you say it doesn't seem to be as random as you hoped, what are you
> using as your measurement for randomness?
I did a little test to see if random() produced significantly different
results being run once per invocation as opposed to in a loop. This took a
while because the loop was pretty fast compared to starting perl up
750,000 times :)
Here's the output from the loop:
Mean 603.293974 Variance 608.550021 Standard Dev: 24.668807
Here's the output from running the script 740,846 times.
Mean 603.294788 Variance 636.770405 Standard Dev: 25.234310
So they're both pretty random, certainly random enough to select MP3s for
Philip Plane _____ philip at xinqu.net
Glider pilots have no visible means of support
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