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author | Raymond Hettinger <rhettinger@users.noreply.github.com> | 2021-05-25 06:04:04 (GMT) |
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committer | GitHub <noreply@github.com> | 2021-05-25 06:04:04 (GMT) |
commit | 2f2e703244beb4078edebc3b029d13af183d1f95 (patch) | |
tree | 3ee029ef273264ff61eb0cfcada44cffcf6c3622 /Doc | |
parent | 59acfd4a09df1c141dac7845eed008af8970fce7 (diff) | |
download | cpython-2f2e703244beb4078edebc3b029d13af183d1f95.zip cpython-2f2e703244beb4078edebc3b029d13af183d1f95.tar.gz cpython-2f2e703244beb4078edebc3b029d13af183d1f95.tar.bz2 |
bpo-44151: Various grammar, word order, and markup fixes (GH-26344)
Diffstat (limited to 'Doc')
-rw-r--r-- | Doc/library/statistics.rst | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/Doc/library/statistics.rst b/Doc/library/statistics.rst index aad505c..bb03a2c 100644 --- a/Doc/library/statistics.rst +++ b/Doc/library/statistics.rst @@ -643,7 +643,7 @@ However, for reading convenience, most of the examples show sorted sequences. .. versionadded:: 3.10 -.. function:: linear_regression(independent_variable, dependent_variable) +.. function:: linear_regression(x, y, /) Return the slope and intercept of `simple linear regression <https://en.wikipedia.org/wiki/Simple_linear_regression>`_ @@ -651,30 +651,30 @@ However, for reading convenience, most of the examples show sorted sequences. regression describes the relationship between an independent variable *x* and a dependent variable *y* in terms of this linear function: - *y = intercept + slope \* x + noise* + *y = slope \* x + intercept + noise* where ``slope`` and ``intercept`` are the regression parameters that are - estimated, and noise represents the + estimated, and ``noise`` represents the variability of the data that was not explained by the linear regression (it is equal to the difference between predicted and actual values - of dependent variable). + of the dependent variable). Both inputs must be of the same length (no less than two), and - the independent variable *x* needs not to be constant; - otherwise :exc:`StatisticsError` is raised. + the independent variable *x* cannot be constant; + otherwise a :exc:`StatisticsError` is raised. For example, we can use the `release dates of the Monty - Python films <https://en.wikipedia.org/wiki/Monty_Python#Films>`_, and used - it to predict the cumulative number of Monty Python films + Python films <https://en.wikipedia.org/wiki/Monty_Python#Films>`_ + to predict the cumulative number of Monty Python films that would have been produced by 2019 - assuming that they kept the pace. + assuming that they had kept the pace. .. doctest:: >>> year = [1971, 1975, 1979, 1982, 1983] >>> films_total = [1, 2, 3, 4, 5] >>> slope, intercept = linear_regression(year, films_total) - >>> round(intercept + slope * 2019) + >>> round(slope * 2019 + intercept) 16 .. versionadded:: 3.10 |