ee.Reducer.kendallsCorrelation
Creates a reducer that computes the Kendall's Tau-b rank correlation. A positive tau value indicates an increasing trend; negative value indicates a decreasing trend. See https://commons.apache.org/proper/commons-math/javadocs/api-3.6.1/org/apache/commons/math3/stat/correlation/KendallsCorrelation.html for details.
| Usage | Returns |
|---|
ee.Reducer.kendallsCorrelation(numInputs) | Reducer |
| Argument | Type | Details |
|---|
numInputs | Integer, default: 1 | The number of inputs to expect (1 or 2). If 1 is specified, automatically generates sequence numbers for the x value (meaning there can be no ties). |
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Last updated 2024-07-13 UTC.
[null,null,["Last updated 2024-07-13 UTC."],[[["Computes the Kendall's Tau-b rank correlation, indicating increasing trends with positive values and decreasing trends with negative values."],["Provides a reducer that can be used with one or two inputs, automatically generating sequence numbers for the x value when only one input is provided."],["Offers flexibility for analysis by allowing users to specify the number of inputs, accommodating scenarios with or without ties in the x values."],["Built upon the Apache Commons Math library, ensuring reliable and robust correlation calculations based on established statistical methods."],["Enables the identification of monotonic relationships between variables in Earth Engine, facilitating insights into data patterns and trends."]]],["This content describes a reducer that calculates Kendall's Tau-b rank correlation. It returns a reducer object and expects one or two numerical inputs. If only one input is provided, the reducer generates sequence numbers for the x-values, ensuring no ties. The output indicates trend direction: positive tau suggests an increasing trend, while negative tau indicates a decreasing one. The `numInputs` argument defines the expected number of inputs, defaulting to one.\n"]]