API reference¶
Point Pattern¶
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Planar Point Pattern Class 2-D. |
Point Processes¶
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Point Process base class. |
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Poisson point process including \(N\)-conditioned CSR process and \(\lambda\)-conditioned CSR process. |
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Poisson cluster point process (Neyman Scott). |
Centrography¶
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Find minimum bounding rectangle of a point array. |
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Find convex hull of a point array. |
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Find mean center of a point array. |
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Find weighted mean center of a marked point pattern. |
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Find manhattan median of a point array. |
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Calculate standard distance of a point array. |
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Calculate the Euclidean median for a point pattern. |
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Calculate parameters of standard deviational ellipse for a point pattern. |
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Implements Skyum (1990)’s algorithm for the minimum bounding circle in R^2. |
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Sum of Euclidean distances between event points and a selected point. |
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Returns (radius, (center_x, center_y)) of the circumscribed circle by the triangle pqr. |
Quadrat Based Statistics¶
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Rectangle grid structure for quadrat-based method. |
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Hexagon grid structure for quadrat-based method. |
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Quadrat analysis of point pattern. |
Distance Based Statistics¶
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Abstract Base Class for distance statistics. |
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Estimates the nearest neighbor distance distribution function G for a point pattern. |
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Estimates the empty space distribution function for a point pattern: F(d). |
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Estimates the J function for a point pattern [LB96] |
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Estimates the K function for a point pattern. |
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Estimates the \(L\) function for a point pattern [OSullivanU10]. |
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Abstract base class for simulation envelopes. |
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Simulation envelope for G function. |
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Simulation envelope for F function. |
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Simulation envelope for J function. |
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Simulation envelope for K function. |
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Simulation envelope for L function. |
Window functions¶
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Geometric container for point patterns. |
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Convert a libpysal polygon to a Window. |
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Space-Time Interaction Tests¶
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Method for reformatting event data stored in a shapefile for use in calculating metrics of spatio-temporal interaction. |
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Knox test for spatio-temporal interaction. |
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Standardized Mantel test for spatio-temporal interaction. |
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Jacquez k nearest neighbors test for spatio-temporal interaction. |
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Baker’s modified Knox test for spatio-temporal interaction. |