37 lines
8.5 KiB
Plaintext
37 lines
8.5 KiB
Plaintext
(phixonline)-->
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<span style="color: #008080;">function</span> <span style="color: #000000;">generate_statistics</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">)</span>
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<span style="color: #004080;">sequence</span> <span style="color: #000000;">hist</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">10</span><span style="color: #0000FF;">)</span>
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<span style="color: #004080;">atom</span> <span style="color: #000000;">sum_r</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span>
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<span style="color: #000000;">sum_squares</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0.0</span>
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<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">n</span> <span style="color: #008080;">do</span>
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<span style="color: #004080;">atom</span> <span style="color: #000000;">r</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">rnd</span><span style="color: #0000FF;">()</span>
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<span style="color: #000000;">sum_r</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">r</span>
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<span style="color: #000000;">sum_squares</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">r</span><span style="color: #0000FF;">*</span><span style="color: #000000;">r</span>
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<span style="color: #000000;">hist</span><span style="color: #0000FF;">[</span><span style="color: #7060A8;">floor</span><span style="color: #0000FF;">(</span><span style="color: #000000;">10</span><span style="color: #0000FF;">*</span><span style="color: #000000;">r</span><span style="color: #0000FF;">)+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
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<span style="color: #004080;">atom</span> <span style="color: #000000;">mean</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sum_r</span> <span style="color: #0000FF;">/</span> <span style="color: #000000;">n</span>
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<span style="color: #004080;">atom</span> <span style="color: #000000;">stddev</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sqrt</span><span style="color: #0000FF;">((</span><span style="color: #000000;">sum_squares</span> <span style="color: #0000FF;">/</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">mean</span><span style="color: #0000FF;">*</span><span style="color: #000000;">mean</span><span style="color: #0000FF;">)</span>
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<span style="color: #008080;">return</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">mean</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">stddev</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">hist</span><span style="color: #0000FF;">}</span>
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
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<span style="color: #008080;">procedure</span> <span style="color: #000000;">display_statistics</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">)</span>
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<span style="color: #004080;">atom</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">mean</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">stddev</span>
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<span style="color: #004080;">sequence</span> <span style="color: #000000;">hist</span>
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<span style="color: #0000FF;">{</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">mean</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">stddev</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">hist</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">x</span>
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<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"-- Stats for sample size %d\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">n</span><span style="color: #0000FF;">})</span>
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<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"mean: %g\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">mean</span><span style="color: #0000FF;">})</span>
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<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"sdev: %g\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">stddev</span><span style="color: #0000FF;">})</span>
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<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">hist</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
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<span style="color: #004080;">integer</span> <span style="color: #000000;">cnt</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">hist</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span>
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<span style="color: #004080;">string</span> <span style="color: #000000;">bars</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #008000;">'='</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">floor</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cnt</span><span style="color: #0000FF;">*</span><span style="color: #000000;">300</span><span style="color: #0000FF;">/</span><span style="color: #000000;">n</span><span style="color: #0000FF;">))</span>
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<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%.1f: %s %d\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">i</span><span style="color: #0000FF;">/</span><span style="color: #000000;">10</span><span style="color: #0000FF;">,</span><span style="color: #000000;">bars</span><span style="color: #0000FF;">,</span><span style="color: #000000;">cnt</span><span style="color: #0000FF;">})</span>
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
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<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
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<span style="color: #008080;">for</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">=</span><span style="color: #000000;">2</span> <span style="color: #008080;">to</span> <span style="color: #000000;">5</span> <span style="color: #008080;">do</span>
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<span style="color: #000000;">display_statistics</span><span style="color: #0000FF;">(</span><span style="color: #000000;">generate_statistics</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">power</span><span style="color: #0000FF;">(</span><span style="color: #000000;">10</span><span style="color: #0000FF;">,</span><span style="color: #000000;">n</span><span style="color: #0000FF;">+(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">=</span><span style="color: #000000;">5</span><span style="color: #0000FF;">))))</span>
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
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