12 lines
270 B
Nim
12 lines
270 B
Nim
import math, strutils
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var sdSum, sdSum2, sdN = 0.0
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proc sd(x: float): float =
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sdN += 1
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sdSum += x
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sdSum2 += x * x
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sqrt(sdSum2 / sdN - sdSum * sdSum / (sdN * sdN))
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for value in [float 2,4,4,4,5,5,7,9]:
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echo value, " ", formatFloat(sd(value), precision = -1)
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