Averages/Simple moving average: Difference between revisions
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(→{{header|Perl}}: some more clarification and code clean-up) |
(Add Brat implementation) |
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Number = 1 SMA3 = 2 SMA5 = 3 |
Number = 1 SMA3 = 2 SMA5 = 3 |
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</pre> |
</pre> |
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=={{header|Brat}}== |
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Object version |
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<lang brat> |
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SMA = object.new |
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SMA.init = { period | |
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my.period = period |
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my.list = [] |
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my.average = 0 |
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} |
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SMA.prototype.add = { num | |
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true? my.list.length >= my.period |
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{ my.list.deq } |
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my.list << num |
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my.average = my.list.reduce(:+) / my.list.length |
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} |
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sma3 = SMA.new 3 |
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sma5 = SMA.new 5 |
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[1, 2, 3, 4, 5, 5, 4, 3, 2, 1].each { n | |
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p n, " - SMA3: ", sma3.add(n), " SMA5: ", sma5.add(n) |
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}</lang> |
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Function version |
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<lang brat>sma = { period | |
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list = [] |
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{ num | |
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true? list.length >= period |
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{ list.deq } |
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list << num |
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list.reduce(:+) / list.length |
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} |
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} |
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sma3 = sma 3 |
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sma5 = sma 5 |
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[1, 2, 3, 4, 5, 5, 4, 3, 2, 1].each { n | |
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p n, " - SMA3: ", sma3(n), " SMA5: ", sma5(n) |
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}</lang> |
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Output: |
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<pre>1 - SMA3: 1 SMA5: 1 |
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2 - SMA3: 1.5 SMA5: 1.5 |
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3 - SMA3: 2 SMA5: 2 |
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4 - SMA3: 3 SMA5: 2.5 |
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5 - SMA3: 4 SMA5: 3 |
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5 - SMA3: 4.6666666666667 SMA5: 3.8 |
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4 - SMA3: 4.6666666666667 SMA5: 4.2 |
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3 - SMA3: 4 SMA5: 4.2 |
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2 - SMA3: 3 SMA5: 3.8 |
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1 - SMA3: 2 SMA5: 3</pre> |
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=={{header|C}}== |
=={{header|C}}== |
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