| amean | Arithmetic mean of an i64 slice
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| ameanstd | Arithmetic mean and standard deviation of an i64 slice
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| autocorr | (Auto)correlation coefficient of pairs of successive values of (time series) integer variable.
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| awmean | Linearly weighted arithmetic mean of an i64 slice.
Linearly descending weights from n down to one.
Time dependent data should be in the stack order - the last being the oldest.
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| awmeanstd | Liearly weighted arithmetic mean and standard deviation of an i64 slice.
Linearly descending weights from n down to one.
Time dependent data should be in the stack order - the last being the oldest.
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| correlation | Correlation coefficient of a sample of two integer variables.
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| gmean | Geometric mean of an i64 slice.
The geometric mean is just an exponential of an arithmetic mean
of log data (natural logarithms of the data items).
The geometric mean is less sensitive to outliers near maximal value.
Zero valued data is not allowed.
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| gmeanstd | Geometric mean and std ratio of an i64 slice.
Zero valued data is not allowed.
Std of ln data becomes a ratio after conversion back.
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| gwmean | Time linearly weighted geometric mean of an i64 slice.
Linearly descending weights from n down to one.
Time dependent data should be in the stack order - the last being the oldest.
The geometric mean is just an exponential of an arithmetic mean
of log data (natural logarithms of the data items).
The geometric mean is less sensitive to outliers near maximal value.
Zero data is not allowed - would at best only produce zero result.
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| gwmeanstd | Linearly weighted version of gmeanstd.
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| hmean | Harmonic mean of an i64 slice.
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| hwmean | Linearly weighted harmonic mean of an i64 slice.
Linearly descending weights from n down to one.
Time dependent data should be in the stack order - the last being the oldest.
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| median | Fast median (avoids sorting).
The data values must be within a moderate range not exceeding u16size (65535).
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