27 lines
511 B
Plaintext
27 lines
511 B
Plaintext
func generate_statistics(n) {
|
||
var(sum=0, sum2=0)
|
||
var hist = 10.of(0)
|
||
|
||
n.times {
|
||
var r = 1.rand
|
||
sum += r
|
||
sum2 += r**2
|
||
hist[10*r] += 1
|
||
}
|
||
|
||
var mean = sum/n
|
||
var stddev = sqrt(sum2/n - mean**2)
|
||
|
||
say "size: #{n}"
|
||
say "mean: #{mean}"
|
||
say "stddev: #{stddev}"
|
||
|
||
var max = hist.max
|
||
for i in ^hist {
|
||
printf("%.1f:%s\n", 0.1*i, "=" * 70*hist[i]/max)
|
||
}
|
||
print "\n"
|
||
}
|
||
|
||
[100, 1000, 10000].each {|n| generate_statistics(n) }
|