Distributional Statistics
Data scientists frequently want to find anomalies in numerical data. To that end, HCP has some simple distributional statistics.
Function | Description | Input | Returns |
---|---|---|---|
STATS_ADD | Adds one or more input values to those that are used to calculate the summary statistics. |
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A Stellar statistics object |
STATS_BIN | Computes the bin that the value is in based on the statistical distribution. |
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Which bin N the value falls in such that bound(N-1) < value <= bound(N). No min and max bounds are provided, so values smaller than the 0'th bound go in the 0'th bin, and values greater than the last bound go in the M'th bin. |
STATS_COUNT | Calculates the count of the values accumulated (or in the window if a window is used). |
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The count of the values in the window or NaN if the statistics object is null |
STATS_GEOMETRIC_MEAN | Calculates the geometric mean of the accumulated values (or in the window if a window is used). |
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The geometric mean of the values in the window or NaN if the statistics object is null. |
STATS_INIT | Initializes a statistics object |
|
A Stellar statistics object |
STATS_KURTOSIS | Calculates the kurtosis of the accumulated values (or in the window if a window is used). |
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The kurtosis of the values in the window or NaN if the statistics object is null |
STATS_MAX | Calculates the maximum of the accumulated values (or in the window if a window is used). |
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The maximum of the accumulated values in the window or NaN if the statistics object is null. |
STATS_MEAN | Calculates the mean of the accumulated values (or in the window if a window is used). |
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The mean of the values in the window or NaN if the statistics object is null. |
STATS_MERGE | Merges statistics objects |
|
A Stellar statistics object |
STATS_MIN | Calculates the minimum of the accumulated values (or in the window if a window is used). |
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The minimum of the accumulated values in the window or NaN if the statistics object is null. |
STATS_PERCENTILE | Computes the p'th percentile of the accumulated values (or in the window if a window is used). |
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The p'th percentile of the data or NaN if the statistics object is null |
STATS_POPULATION_VARIANCE | Calculates the population variance of the accumulated values (or in the window if a window is used). |
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The population variance of the values in the window or NaN if the statistics object is null. |
STATS_QUADRATIC_MEAN | Calculates the quadratic mean of the accumulated values (or in the window if a window is used). |
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The quadratic mean of the values in the window or NaN if the statistics object is null. |
STATS_SD | Calculates the standard deviation of the accumulated values (or in the window if a window is used). |
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The standard deviation of the values in the window or NaN if the statistics object is null. |
STATS_SKEWNESS | Calculates the skewness of the accumulated values (or in the window if a window is used). |
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The skewness of the values in the window or NaN if the statistics object is null. |
STATS_SUM | Calculates the sum of the accumulated values (or in the window if a window is used). |
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The sum of the values in the window or NaN if the statistics object is null. |
STATS_SUM_LOGS | Calculates the sum of the (natural) log of the accumulated values (or in the window if a window is used). |
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The sum of the (natural) log of the values in the window or NaN if the statistics object is null. |
STATS_SUM_SQUARES | Calculates the sum of the squares of the accumulated values (or in the window if a window is used). |
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The sum of the squares of the values in the window or NaN if the statistics object is null. |
STATS_VARIANCE | Calculates the variance of the accumulated values (or in the window if a window is used). |
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The variance of the values in the window or NaN if the statistics object is null. |