Verify distribution uniformity/Naive: Difference between revisions
Verify distribution uniformity/Naive (view source)
Revision as of 10:32, 16 February 2024
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Line 259:
Count = 1000000: flat
</pre>
=={{header|C#}}==
{{trans|Java}}
<syntaxhighlight lang="C#">
using System;
using System.Collections.Generic;
using System.Linq;
public class Test
{
static void DistCheck(Func<int> func, int nRepeats, double delta)
{
var counts = new Dictionary<int, int>();
for (int i = 0; i < nRepeats; i++)
{
int result = func();
if (counts.ContainsKey(result))
counts[result]++;
else
counts[result] = 1;
}
double target = nRepeats / (double)counts.Count;
int deltaCount = (int)(delta / 100.0 * target);
foreach (var kvp in counts)
{
if (Math.Abs(target - kvp.Value) >= deltaCount)
Console.WriteLine("distribution potentially skewed for '{0}': '{1}'", kvp.Key, kvp.Value);
}
foreach (var key in counts.Keys.OrderBy(k => k))
{
Console.WriteLine("{0} {1}", key, counts[key]);
}
}
public static void Main(string[] args)
{
DistCheck(() => new Random().Next(1, 6), 1_000_000, 1);
}
}
</syntaxhighlight>
{{out}}
<pre>
1 200274
2 199430
3 199418
4 200473
5 200405
</pre>
=={{header|C++}}==
Line 1,872 ⟶ 1,926:
Over 10000 runs dice5 passed distribution check
Over 100000 runs dice5 passed distribution check
</pre>
=={{header|RPL}}==
Calculated frequencies are negative when below/above the tolerance given by <code>delta</code>.
<code>DICE7</code> is defined at [[Seven-sided dice from five-sided dice#RPL|Seven-sided dice from five-sided dice]]
≪ 1 → func n delta bins
≪ { 1 } 0 CON
1 n '''FOR''' j
func EVAL
'''IF''' bins OVER < '''THEN'''
DUP 'bins' STO
1 →LIST RDM bins
'''END'''
DUP2 GET 1 + PUT
'''NEXT'''
1 bins '''FOR''' j
DUP j GET
'''IF'''
DUP n bins / %CH 100 / ABS
delta >
'''THEN''' NEG j SWAP PUT '''ELSE''' DROP '''END'''
'''NEXT'''
≫ ≫ '<span style="color:blue">UNIF?</span>' STO
≪ <span style="color:blue">DICE7</span> ≫ 10000 .05 <span style="color:blue">UNIF?</span>
≪ 6 RAND * CEIL ≫ 1000 .05 <span style="color:blue">UNIF?</span>
{{out}}
<pre>
2: [ 1439 1404 1413 1410 1424 1486 1424 ]
1: [ 169 172 -158 163 171 167 ]
</pre>
Line 2,123 ⟶ 2,208:
{{libheader|Wren-fmt}}
{{libheader|Wren-sort}}
<syntaxhighlight lang="
import "./fmt" for Fmt
import "./sort" for Sort
var r = Random.new()
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