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Code Issues Projects Releases Packages Wiki Activity Actions 11

Update nonstandard variable names (GH-26540)

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Raymond Hettinger 2021-06-04 16:28:31 -07:00 • committed by GitHub
parent dda9ecbfec
commit 3668e118f7
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1 changed files with 5 additions and 5 deletions
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10
Lib/statistics.py
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@ -924,10 +924,10 @@ def correlation(x, y, /):
xbar = fsum(x) / n
ybar = fsum(y) / n
sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
s2x = fsum((xi - xbar) ** 2.0 for xi in x)
s2y = fsum((yi - ybar) ** 2.0 for yi in y)
sxx = fsum((xi - xbar) ** 2.0 for xi in x)
syy = fsum((yi - ybar) ** 2.0 for yi in y)
try:
return sxy / sqrt(s2x * s2y)
return sxy / sqrt(sxx * syy)
except ZeroDivisionError:
raise StatisticsError('at least one of the inputs is constant')
@ -968,9 +968,9 @@ def linear_regression(x, y, /):
xbar = fsum(x) / n
ybar = fsum(y) / n
sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
s2x = fsum((xi - xbar) ** 2.0 for xi in x)
sxx = fsum((xi - xbar) ** 2.0 for xi in x)
try:
slope = sxy / s2x # equivalent to: covariance(x, y) / variance(x)
slope = sxy / sxx # equivalent to: covariance(x, y) / variance(x)
except ZeroDivisionError:
raise StatisticsError('x is constant')
intercept = ybar - slope * xbar