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November 26, 2019 16:20
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some python functions
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| def calc_avg(items): | |
| if not items: | |
| return 0 | |
| total = sum(items) | |
| return float(total)/len(items) | |
| def std_deviation(items): | |
| if not items: return 0 | |
| mean = calc_avg(items) | |
| variance = calc_avg([(x - mean)*(x - mean) for x in items]) | |
| return math.sqrt(variance) |
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