pointpats.QStatistic¶

class pointpats.QStatistic(pp, shape='rectangle', nx=3, ny=3, lh=10, realizations=0)[source]¶

Quadrat analysis of point pattern.

Parameters

ppPointPattern: Point Pattern instance.
shapestring: Grid structure. Either “rectangle” or “hexagon”. Default is “rectangle”.
nxinteger: Number of rectangles in the horizontal direction. Only when shape is specified as “rectangle” will nx be considered.
nyinteger: Number of rectangles in the vertical direction. Only when shape is specified as “rectangle” will ny be considered.
lhfloat: Hexagon length (hexagon). Only when shape is specified as “hexagon” will lh be considered. Incompatible with nx & ny.
realizationsPointProcess: Point process instance with more than 1 point pattern realizations which would be used for simulation based inference. Default is 0 where no simulation based inference is performed.

Attributes

ppPointPattern: Point Pattern instance.
mrRectangleM or HexagonM: RectangleM or HexagonM instance.
chi2float: Chi-squared test statistic for the observed point pattern pp.
dfinteger: Degree of freedom.
chi2_pvaluefloat: p-value based on analytical chi-squared distribution.
chi2_r_pvaluefloat: p-value based on simulated sampling distribution. Only available when realizations is correctly specified.
chi2_realizationsarray: Chi-squared test statistics calculated for all of the simulated csr point patterns.

__init__(self, pp, shape='rectangle', nx=3, ny=3, lh=10, realizations=0)[source]¶: Initialize self. See help(type(self)) for accurate signature.

Methods

`__init__`(self, pp[, shape, nx, ny, lh, …])	Initialize self.
`plot`(self[, title])	Plot quadrats as well as the number of points falling in each quadrat.

plot(self, title='Quadrat Count')[source]¶

Plot quadrats as well as the number of points falling in each quadrat.

Parameters