Unbias a random generator: Difference between revisions
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=={{header|Elena}}== |
=={{header|Elena}}== |
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{{trans|C#}} |
{{trans|C#}} |
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ELENA 3. |
ELENA 3.4 : |
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<lang elena>import extensions. |
<lang elena>import extensions. |
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int |
extension<int> op |
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{ |
{ |
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bool randN |
bool randN |
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= randomGenerator nextInt(self) == 0. |
= randomGenerator nextInt(self) == 0. |
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bool unbiased |
bool unbiased |
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[ |
[ |
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bool flip1 := self randN. |
bool flip1 := self randN. |
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bool flip2 := self randN. |
bool flip2 := self randN. |
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while (flip1 == flip2) |
while (flip1 == flip2) |
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[ |
[ |
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flip2 := self randN. |
flip2 := self randN. |
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]. |
]. |
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^ flip1 |
^ flip1 |
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] |
] |
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} |
} |
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public program |
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[ |
[ |
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3 to:6 do(:n)<int> |
3 to:6 do(:n)<int> |
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int unbiasedZero := 0. |
int unbiasedZero := 0. |
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int unbiasedOne := 0. |
int unbiasedOne := 0. |
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0 till:100000 do(:i) |
0 till:100000 do(:i) |
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[ |
[ |
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if (n unbiased) [ unbiasedOne += 1 ]; [ unbiasedZero += 1 ] |
if (n unbiased) [ unbiasedOne += 1 ]; [ unbiasedZero += 1 ] |
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]. |
]. |
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console |
console |
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printLineFormatted("(N = {0}):" padRight(17) + "# of 0"$9"# of 1"$9"% of 0"$9"% of 1", n); |
printLineFormatted("(N = {0}):" padRight(17) + "# of 0"$9"# of 1"$9"% of 0"$9"% of 1", n); |
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unbiasedZero, unbiasedOne, unbiasedZero / 1000, unbiasedOne / 1000). |
unbiasedZero, unbiasedOne, unbiasedZero / 1000, unbiasedOne / 1000). |
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] |
] |
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] |
]</lang> |
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{{out}} |
{{out}} |
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<pre> |
<pre> |
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