Averages/Root mean square: Difference between revisions
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=={{header|Phix}}== |
=={{header|Phix}}== |
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<lang Phix> |
<!--<lang Phix>(phixonline)--> |
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<span style="color: #008080;">function</span> <span style="color: #000000;">rms</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> |
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atom sqsum = 0 |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">sqsum</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span> |
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for i=1 to length(s) 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;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> |
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sqsum += power(s[i],2) |
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<span style="color: #000000;">sqsum</span> <span style="color: #0000FF;">+=</span> <span style="color: #7060A8;">power</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">],</span><span style="color: #000000;">2</span><span style="color: #0000FF;">)</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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return sqrt(sqsum/length(s)) |
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<span style="color: #008080;">return</span> <span style="color: #7060A8;">sqrt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sqsum</span><span style="color: #0000FF;">/</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">))</span> |
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end function |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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?rms({1,2,3,4,5,6,7,8,9,10})</lang> |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">rms</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;">3</span><span style="color: #0000FF;">,</span><span style="color: #000000;">4</span><span style="color: #0000FF;">,</span><span style="color: #000000;">5</span><span style="color: #0000FF;">,</span><span style="color: #000000;">6</span><span style="color: #0000FF;">,</span><span style="color: #000000;">7</span><span style="color: #0000FF;">,</span><span style="color: #000000;">8</span><span style="color: #0000FF;">,</span><span style="color: #000000;">9</span><span style="color: #0000FF;">,</span><span style="color: #000000;">10</span><span style="color: #0000FF;">})</span> |
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<!--</lang>--> |
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{{out}} |
{{out}} |
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<pre> |
<pre> |
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Alternative, same output<br> |
Alternative, same output<br> |
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You could make this a one-liner, for no gain and making it harder to debug - an explicitly named intermediate such as sqsum adds no additional overhead compared to the un-named hidden temporary variable the compiler would otherwise use anyway, and of course sqsum can be examined/verified to pinpoint any error more effectively. The last (commented-out) line also removes the function call, but of course it has also removed every last descriptive hint of what it is supposed to be doing as well. |
You could make this a one-liner, for no gain and making it harder to debug - an explicitly named intermediate such as sqsum adds no additional overhead compared to the un-named hidden temporary variable the compiler would otherwise use anyway, and of course sqsum can be examined/verified to pinpoint any error more effectively. The last (commented-out) line also removes the function call, but of course it has also removed every last descriptive hint of what it is supposed to be doing as well. |
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<lang Phix> |
<!--<lang Phix>(phixonline)--> |
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<span style="color: #008080;">function</span> <span style="color: #000000;">rms</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> |
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atom sqsum = sum(apply(true,power,{s,2})) |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">sqsum</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sum</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">apply</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">power</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">2</span><span style="color: #0000FF;">}))</span> |
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return sqrt(sqsum/length(s)) |
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<span style="color: #008080;">return</span> <span style="color: #7060A8;">sqrt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sqsum</span><span style="color: #0000FF;">/</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">))</span> |
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end function |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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?rms(tagset(10)) |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">rms</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">tagset</span><span style="color: #0000FF;">(</span><span style="color: #000000;">10</span><span style="color: #0000FF;">))</span> |
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-- ?sqrt(sum(apply(true,power,{tagset(10),2}))/10) -- (ugh)</ |
<span style="color: #000080;font-style:italic;">-- ?sqrt(sum(apply(true,power,{tagset(10),2}))/10) -- (ugh)</span> |
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<!--</lang>--> |
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=={{header|Phixmonti}}== |
=={{header|Phixmonti}}== |
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