Averages/Root mean square: Difference between revisions
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(→{{header|Python}}: Added a single fold version using `reduce`) |
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<small>Note that function [http://docs.python.org/release/3.2/library/functions.html#range range] in Python includes the first limit of 1, excludes the second limit of 11, and has a default increment of 1.</small> |
<small>Note that function [http://docs.python.org/release/3.2/library/functions.html#range range] in Python includes the first limit of 1, excludes the second limit of 11, and has a default increment of 1.</small> |
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The Python 2 version is nearly identical, except you must cast the sum to a float to get float division instead of integer division; or better, do a <code>from __future__ import division</code>, which works on Python 2.2+ as well as Python 3, and makes division work consistently like it does in Python 3. |
The Python 2 version of this is nearly identical, except you must cast the sum to a float to get float division instead of integer division; or better, do a <code>from __future__ import division</code>, which works on Python 2.2+ as well as Python 3, and makes division work consistently like it does in Python 3. |
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Alternatively in terms of '''reduce''': |
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<lang python>from functools import (reduce) |
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from math import (sqrt) |
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# rootMeanSquare :: [Num] -> Float |
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def rootMeanSquare(xs): |
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return sqrt(reduce(lambda a, x: a + x * x, xs, 0) / len(xs)) |
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print( |
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rootMeanSquare([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) |
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)</lang> |
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{{Out}} |
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<pre>6.2048368229954285</pre> |
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=={{header|Qi}}== |
=={{header|Qi}}== |
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