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spatstat (version 1.13-4)

Spatial Point Pattern analysis, model-fitting, simulation, tests

Description

A package for analysing spatial data, mainly Spatial Point Patterns, including multitype/marked points and spatial covariates, in any two-dimensional spatial region. Contains functions for plotting spatial data, exploratory data analysis, model-fitting, simulation, spatial sampling, model diagnostics, and formal inference. Data types include point patterns, line segment patterns, spatial windows, and pixel images. Point process models can be fitted to point pattern data. Cluster type models are fitted by the method of minimum contrast. Very general Gibbs point process models can be fitted to point pattern data using a function ppm similar to lm or glm. Models may include dependence on covariates, interpoint interaction and dependence on marks. Fitted models can be simulated automatically. Also provides facilities for formal inference (such as chi-squared tests) and model diagnostics (including simulation envelopes, residuals, residual plots and Q-Q plots).

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Version

Install

install.packages('spatstat')

Monthly Downloads

16,590

Version

1.13-4

License

GPL (>= 2)

Maintainer

Adrian Baddeley

Last Published

March 22nd, 2025

Functions in spatstat (1.13-4)

The Soft Core Point Process Model

Convert Pixel Image to Matrix

Chorley-Ribble Cancer Data

Marked J Function

Inhomogeneous Cross K Function

Multitype K Function (i-to-any)

Distance to Boundary of Window

Piecewise Constant Saturated Pairwise Interaction Point Process Model

Convert Point Pattern Marks from Numeric to Factor

as.data.frame.ppp

Coerce Point Pattern to a Data Frame

Evaluate an Expression in Each Row of a Hyperframe

The Piecewise Constant Pairwise Interaction Point Process Model

Calculate four standard summary functions of a point pattern.

Humberside Data on Childhood Leukaemia and Lymphoma

Biological Cells Point Pattern

Artificial Data Point Pattern

compatible.fasp

Test Whether Two Function Arrays Are Compatible

Hutchings' Bramble Canes data

Dilate a Window

Nearest Neighbour Distance Function G

Multitype K Function (Cross-type)

Marked Nearest Neighbour Distance Function

Test Whether Marks Are Present

MultiStraussHard

The Multitype/Hard Core Strauss Point Process Model

Combine Two Line Segment Patterns

Aherne's hamster tumour data

Exponential Energy Marks

Evaluate Expression Involving Pixel Images

Lengths of Line Segments

Multitype L-function (i-to-any)

Hybrid Geyer Point Process Model

The Strauss / Hard Core Point Process Model

Evaluate Expression Involving Functions

Test Whether A Point Pattern is Marked

Rotate a Line Segment Pattern

Ord Interaction Process Family

Generate Multitype Poisson Point Pattern

Inhomogeneous K-function

Clark and Evans Aggregation Index

The Area Interaction Point Process Model

The Strauss Point Process Model

Estimate the I-function

Pairwise distances between line segments

crossdist.default

Pairwise distances between two different sets of points

Neighbourhood density function

Calculate Summary Statistic for All Types in a Multitype Point Pattern

Read Point Pattern From Data File

Pair Correlation Function obtained from K Function

Generic Ord Interaction model

Convert Pixel Image from Numeric to Factor

Distance Map of Line Segment Pattern

Pixel Image Approximation of a Window

Pair Correlation Function obtained from array of K functions

Compute Integral of Function Against Cumulative Distribution

Distance Map of Point Pattern

Basis for Harmonic Functions

Corners of a rectangle

Pairwise distances

Apply Affine Transformation To Point Pattern

The Spatstat Package

Rotate a Point Pattern

Difference of Disc Areas

Tabulate Marks in Neighbourhood of Every Point in a Point Pattern

Log Likelihood for Poisson Point Process Model

spatstat-deprecated

Deprecated spatstat functions

Diggle-Gratton model

Convert Data To Class ppp

Convert to Pixel Image

Summarise Marks in Every Neighbourhood in a Point Pattern

Multitype Nearest Neighbour Distance Function (i-to-any)

Tropical rain forest trees

Diameter of a Window

Centroid of a window

Estimate the empty space function F

Print Brief Details of a Line Segment Pattern Dataset

Pair Correlation Function

Distance to Boundary of Window

Estimate window from points alone

Beadlet Anemones Data

Multitype Nearest Neighbour Distance Function (i-to-j)

Generate Poisson Random Line Process

Test Whether Two Pixel Images Are Compatible

Extract Original Data from a Fitted Point Process Model

plot a Fitted Point Process Model

Plot a Function Array

K-function using FFT

Hyper Data Frame

Safely Convert Point Pattern Window to Binary Mask

Multitype J Function (i-to-any)

Convex Hull of Points

The Lennard-Jones Potential

Areas of Morphological Erosions

Generate Poisson Point Pattern

Estimate the J-function

density.splitppp

Kernel Smoothed Intensity of Split Point Pattern

Bounding Box of a Window or Point Pattern

Determine Whether One Window is Contained In Another

Pairwise distances

Kernel Smoothing of Line Segment Pattern

Ord's Interaction model

Coefficients of Fitted Point Process Model

Convert Data To Class owin

Create a Point Pattern

dirichlet.weights

Compute Quadrature Weights Based on Dirichlet Tessellation

Create a Pixel Image Object

Generate a Default Pattern of Dummy Points

Class of Images

Level Set of a Pixel Image

Determine Duplicated Points in a Spatial Point Pattern

Quadrat counting for a point pattern

Compute Quadrature Weights Based on Grid Counts

Spokes pattern of dummy points

Plot a List of Point Patterns

Convert Line Segment Pattern to Another Unit of Length

Randomly Shift a Point Pattern

Interactively Define a Polygon

Data Frames of Function Values

Saturated Pairwise Interaction model

Pairwise distances between two different point patterns

Distance Map of Window

Convert Polygonal Region into Different Format

Interpolate a Pixel Image

Determine Initial State for Metropolis-Hastings Simulation.

Apply Affine Transformation To Window

is.multitype.ppm

Test Whether A Point Process Model is Multitype

Test Whether A Point Process Model is Marked

Intersection or Union of Two Windows

Identify Points in a Point Pattern

Print a Fitted Point Process Model

Geyer's Saturation Point Process Model

Urkiola Woods Point Pattern

Test Whether An Object Is A Point Pattern

Class of Quadrature Schemes

Pine saplings in Finland.

The Multitype Strauss Point Process Model

Function Arrays for Spatial Patterns

Q-Q Plot of Residuals from Fitted Point Process Model

Plot a Pixel Image

Point Patterns of New Brunswick Forest Fires

Generate a Quadrature Scheme from a Point Pattern

Interpret Fitted Model for Metropolis-Hastings Simulation.

Inhomogeneous Multitype K Dot Function

Cartesian Coordinates for a Pixel Raster

Multitype J Function (i-to-j)

Cut margins from rectangle

ANOVA for Fitted Point Process Models

Nearest neighbour distances between line segments

Mean Pixel Value in an Image

Expand Window By Factor

is.multitype.ppp

Test Whether A Point Pattern is Multitype

spatstat-internal

Internal spatstat functions

Simulate Matern Model I

Compute Images of Constructed Covariates

Extract Dummy Points Used to Fit a Point Process Model

Poisson Point Process Model

Harkness-Isham ants' nests data

Rectangular grid of points

Define Point Process Model for Metropolis-Hastings Simulation.

Apply Affine Transformation

Interactively Add Points

Fit the Thomas Point Process by Minimum Contrast

plot a Spatial Line Segment Pattern

Simulation envelopes of summary function

Simulate systematic random point pattern

Nearest neighbour

Contour plot of pixel image

Class of Fitted Point Process Models

Mark Correlation Function

plot a Spatial Point Pattern

Convert Data To Class psp

Reduced Second Moment Measure

Fit cluster point process model

Extract or Replace Subset of Point Pattern

Japanese Pines Point Pattern

Kaplan-Meier and Reduced Sample Estimator using Histograms

Test Whether An Object Is A Pixel Image

Beta Ganglion Cells in Cat Retina

Test Whether Two Function Objects Are Compatible

Area of a Window

Chi-Squared Dispersion Test for Spatial Point Pattern Based on Quadrat Counts

Convert dataset to another unit of length

Concatenate x,y Coordinate Vectors

Convert Window to Another Unit of Length

Apply Vector Translation

Simulate a fitted cluster point process model.

Marked K-Function

Hughes' Amacrine Cell Data

Test Whether An Object Is A Window

Longleaf Pines Point Pattern

pairwise.family

Pairwise Interaction Process Family

Crossing Points of Two Line Segment Patterns

multiplicity.ppp

Count Multiplicity of Duplicate Points

Nearest neighbour distances

Perspective Plot of Pixel Image

Method of Minimum Contrast

Test whether Object is Multitype

Simulate Matern Cluster Process

Set Covariance of a Window

Simulate Point Process Models using the Metropolis-Hastings Algorithm.

Apply Gaussian Blur to a Pixel Image

Endpoints of Line Segment Pattern

Multitype L-function (cross-type)

complement.owin

Take Complement of a Window

Vertices of a Window

Generate N Random Multitype Points

Generate grid of parallel lines with random displacement

Create a Window

rshift.splitppp

Randomly Shift a List of Point Patterns

Simulate Gauss-Poisson Process

Fit the Matern Cluster Point Process by Minimum Contrast

selfcrossing.psp

Crossing Points in a Line Segment Pattern

Randomly Shift a Line Segment Pattern

Define Point Process Model for Metropolis-Hastings Simulation.

Extract Quadrature Scheme Used to Fit a Point Process Model

Summary of a List of Things

Generic Pairwise Interaction model

Apply Vector Translation To Window

Plot a Spatial Window

bounding.box.xy

Convex Hull of Points

Reduced Sample Estimator using Histogram Data

Update a Fitted Point Process Model

New Zealand Trees Point Pattern

Apply Affine Transformation To Line Segment Pattern

Print a Quadrature Scheme

Simulate Simple Sequential Inhibition

Simulate Neyman-Scott Process

Orientation Angles of Line Segments

Kernel Smoothed Intensity of Point Pattern

Berman-Huntington points and lines data

Histogram of Pixel Values in an Image

Apply Vector Translation To Line Segment Pattern

Summary of a Point Pattern Dataset

Diagnostic Plots for Fitted Point Process Model

Fit Point Process Model to Data

Apply Vector Translation To Point Pattern

summary.splitppp

Summary of a Split Point Pattern

Kolmogorov-Smirnov Test for Point Process Model

Fitted Conditional Intensity for Point Process Model

Beta Ganglion Cells in Cat Retina, Old Version

Summary of a Spatial Window

California Redwoods Point Pattern (Entire Dataset)

Print Brief Details of a Spatial Window

Apply Function to Every Neighbourhood in a Point Pattern

Pairwise distances between two different line segment patterns

Weighted Empirical Cumulative Distribution Function

plot a Spatial Quadrature Scheme

Test Whether Points Are Inside A Window

Plot a fitted cluster point process

Plot a List of Things

Simulate Matern Model II

Window in Shape of Letter R

Random Perturbation of a Point Pattern

Create a Line Segment Pattern

spatstat.options

Internal Options in Spatstat Package

Perfect Simulation of the Strauss Process

Fit a Log-Gaussian Cox Point Process by Minimum Contrast

Simulate Stratified Random Point Pattern

Profile Maximum Pseudolikelihood

Convert Point Pattern to Another Unit of Length

Simulate from a Fitted Point Process Model

Simulate Baddeley-Silverman Cell Process

Evaluate Expression Involving Function Arrays

Midpoints of Line Segment Pattern

California Redwoods Point Pattern (Ripley's Subset)

Extract the Interaction from a Fitted Point Process Model

Test Whether An Object Is A Fitted Point Process Model

Distance for a Point Pattern Matching

Kaplan-Meier Estimator using Histogram Data

Lurking variable plot

Plot Function Valuesn

Extract Subset of Function Array

Distance Between Two Point Patterns

Data and Code From JRSS Discussion Paper on Residuals

Class of Point Patterns

model.matrix.ppm

Extract Design Matrix from Point Process Model

Print Brief Details of an Image

Generate N Random Points

Circular Window

Random Thinning

Union of Data and Dummy Points

pppmatching.object

Class of Point Matchings

Prediction from a Fitted Cluster Point Process Model

Nearest Neighbour in Another Point Pattern

Compute Fitted Effect of a Spatial Covariate in a Point Process Model

Remove Marks from a Marked Point Pattern

Update a Fitted Cluster Point Process Model

Extract Subset of Line Segment Pattern

Set or Reset the Marks in a Point Pattern

Superimpose Several Point Patterns

Reset Values in Subset of Image

Set Control Parameters for Metropolis-Hastings Algorithm.

Lansing Woods Point Pattern

Generate N Uniform Random Points in a Disc

inforder.family

Infinite Order Interaction Family

Prediction from a Fitted Point Process Model

Plot a plotppm Object Created by plot.ppm

Rotate a Window

Pairwise distances

Sufficient Statistic of Point Process Model

Nearest-Neighbour Correlation of Marked Point Pattern

Simulate Thomas Process

Evaluate Logical Expression Involving Pixel Images and Return Region Where Expression is True

Sample Quantiles of Pixel Image

plot.hyperframe

Plot Entries in a Hyperframe

Simulate point patterns using the Metropolis-Hastings algorithm.

Random Re-Labelling of Point Pattern

Summary of a Line Segment Pattern Dataset

Print Brief Details of a Point Pattern Dataset

Pair Correlation Function of Point Pattern

Apply Vector Translation To Pixel Image

rescue.rectangle

Convert Window Back To Rectangle

Evaluate an Expression in a Function Table

Print Progress Reports

Summarizing a Pixel Image

pairdist.default

Pairwise distances

Extract Subset of Function Values

Saturated Pairwise Interaction Point Process Family

Residuals for Fitted Point Process Model

Interaction Distance of a Point Process

Generate N Uniform Random Points

Extract or Replace Subset of a List of Things

rmhmodel.default

Build Point Process Model for Metropolis-Hastings Simulation.

Spruces Point Pattern

Name for Unit of Length

subset.splitppp

Extract or Replace Sub-Patterns

Simulated Point Pattern

nearest.raster.point

Find Pixel Nearest to a Given Point

Spatial smoothing of observations at irregular points

Ponderosa Pine Tree Point Pattern

Create a Point Matching

Class of Line Segment Patterns

Swedish Pines Point Pattern

Divide Point Pattern into Sub-patterns

Extract Subset of Image

Extract Unique Points from a Spatial Point Pattern

Summarizing a Quadrature Scheme

Summarizing a Fitted Point Process Model

Variance-Covariance Matrix for a Fitted Point Process Model