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37 lines
766 B
Text
37 lines
766 B
Text
@load ./variance
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@load base/frameworks/sumstats
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module SumStats;
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export {
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redef enum Calculation += {
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## Find the standard deviation of the values.
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STD_DEV
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};
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redef record ResultVal += {
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## For numeric data, this calculates the standard deviation.
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std_dev: double &default=0.0;
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};
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}
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function calc_std_dev(rv: ResultVal)
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{
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if ( rv?$variance )
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rv$std_dev = sqrt(rv$variance);
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}
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# This depends on the variance plugin which uses priority -5
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hook add_to_reducer_hook(r: Reducer, val: double, data: Observation, rv: ResultVal) &priority=-10
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{
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if ( STD_DEV in r$apply )
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{
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if ( rv?$variance )
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calc_std_dev(rv);
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}
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}
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hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal) &priority=-10
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{
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calc_std_dev(result);
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}
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