Feigenbaum constant calculation: Difference between revisions
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=={{header|Phix}}== |
=={{header|Phix}}== |
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{{trans|Ring}} |
{{trans|Ring}} |
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<lang Phix> |
<!--<lang Phix>(phixonline)--> |
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<span style="color: #008080;">constant</span> <span style="color: #000000;">maxIt</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">13</span><span style="color: #0000FF;">,</span> |
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maxItJ = 10 |
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<span style="color: #000000;">maxItJ</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">10</span> |
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atom a1 = 1.0, |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">a1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1.0</span><span style="color: #0000FF;">,</span> |
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a2 = 0.0, |
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<span style="color: #000000;">a2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0.0</span><span style="color: #0000FF;">,</span> |
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d1 = 3.2 |
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<span style="color: #000000;">d1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">3.2</span> |
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puts(1," i d\n") |
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<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" i d\n"</span><span style="color: #0000FF;">)</span> |
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for i=2 to maxIt do |
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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;">2</span> <span style="color: #008080;">to</span> <span style="color: #000000;">maxIt</span> <span style="color: #008080;">do</span> |
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atom a = a1 + (a1 - a2) / d1 |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">a</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a1</span> <span style="color: #0000FF;">+</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">a1</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">a2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">/</span> <span style="color: #000000;">d1</span> |
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for j=1 to maxItJ do |
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<span style="color: #008080;">for</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">maxItJ</span> <span style="color: #008080;">do</span> |
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atom x = 0, y = 0 |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">y</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span> |
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for k=1 to power(2,i) do |
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<span style="color: #008080;">for</span> <span style="color: #000000;">k</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">power</span><span style="color: #0000FF;">(</span><span style="color: #000000;">2</span><span style="color: #0000FF;">,</span><span style="color: #000000;">i</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> |
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y = 1 - 2*y*x |
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<span style="color: #000000;">y</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">2</span><span style="color: #0000FF;">*</span><span style="color: #000000;">y</span><span style="color: #0000FF;">*</span><span style="color: #000000;">x</span> |
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x = a - x*x |
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<span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">*</span><span style="color: #000000;">x</span> |
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end for |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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a = a - x/y |
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<span style="color: #000000;">a</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">/</span><span style="color: #000000;">y</span> |
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end for |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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atom d = (a1-a2)/(a-a1) |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">d</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">a1</span><span style="color: #0000FF;">-</span><span style="color: #000000;">a2</span><span style="color: #0000FF;">)/(</span><span style="color: #000000;">a</span><span style="color: #0000FF;">-</span><span style="color: #000000;">a1</span><span style="color: #0000FF;">)</span> |
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printf(1,"%2d %.8f\n",{i,d}) |
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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;">"%2d %.8f\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">i</span><span style="color: #0000FF;">,</span><span style="color: #000000;">d</span><span style="color: #0000FF;">})</span> |
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d1 = d |
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<span style="color: #000000;">d1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">d</span> |
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a2 = a1 |
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<span style="color: #000000;">a2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a1</span> |
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a1 = a |
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<span style="color: #000000;">a1</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a</span> |
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| ⚫ | |||
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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| ⚫ | |||
{{out}} |
{{out}} |
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<pre> |
<pre> |
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