spatstat.sparse

Sparse 3-dimensional arrays and linear algebra utilities

This repository contains the current development version of the spatstat.sparse package.

For the most recent official release of spatstat.sparse, see the CRAN page.

Functionality provided

The spatstat.sparse package

• defines a class of sparse three-dimensional arrays and supports standard operations on them.

• provides utility functions for matrix computations that are common in statistics, such as quadratic forms.

For sparse three-dimensional arrays, the package supports

• creation of sparse arrays from raw data (numeric, integer, logical, or complex values)

• conversion to/from other data types

• array indexing, extraction of entries, assignment of new values

• arithmetic and logical operations

• tensor operations (generalising matrix multiplication)

• permutation of array dimensions

• binding of several arrays into a single array

• printing of sparse arrays.

For computation with matrices and sparse matrices, the package supports

• linear algebra operations including calculation of quadratic forms, bilinear forms, fractional powers of a matrix.

• generating simulated realisations of a Markov chain with transition probabilities given by a sparse matrix.