
        CHANGES IN spatstat.sparse VERSION 3.2-0

OVERVIEW

    o Simulate a Markov chain with sparse transition matrix.

    o Recreate a symmetric matrix from its lower triangular entries.

    o Weighted sum of outer products in a 3D array or sparse array.

    o Minor improvements and bug fixes

NEW FUNCTIONS

    o runSparseMarkovChain
    Generate simulated realisations of a Markov chain
    using a sparse matrix representation of the transition probability matrix.

    o symmatrix
    Recreate a symmetric matrix from a vector containing its lower triangular
    (or upper triangular) entries.

    o length.sparse3Darray
    Method for 'length' for sparse 3D arrays.

    o sumsymouter
    Weighted sum of outer products in a 3D array or sparse array

BUG FIXES

   o numerous calculations with sparse matrices
   Results were sometimes incorrect for symmetric sparse matrices
   inheriting class "symmetricMatrix".
   Fixed.

        CHANGES IN spatstat.sparse VERSION 3.1-0

OVERVIEW

    o Internal improvements.


        CHANGES IN spatstat.sparse VERSION 3.0-3

OVERVIEW

    o Minor improvements.

        CHANGES IN spatstat.sparse VERSION 3.0-2

OVERVIEW

    o We thank Joey Arthur for contributions.
    
    o Bug fix.

BUG FIXES

    o marginSumsSparse
    If the result of marginSumsSparse was a one-dimensional sparse vector,
    the entries were incorrectly rearranged so that the non-zero entries
    were all at the beginning of the vector.
    [Spotted by Joey Arthur.]
    Fixed.

        CHANGES IN spatstat.sparse VERSION 3.0-1

OVERVIEW

    o Minor changes to package information.


        CHANGES IN spatstat.sparse VERSION 3.0-0

OVERVIEW

    o Minor internal changes.

        CHANGES IN spatstat.sparse VERSION 2.1-1

OVERVIEW

    o Bug fix.
    
BUG FIXES

    o matrixsqrt, matrixinvsqrt, matrixpower
    If the result was a complex-valued matrix,
    the values were completely incorrect.
    Fixed.

        CHANGES IN spatstat.sparse VERSION 2.1-0

OVERVIEW

    o Join two sparse arrays.
    
    o Minor improvements and bug fixes.

NEW FUNCTIONS

    o bind.sparse3Darray
    Join two sparse three-dimensional arrays along a specified dimension
    (analogously to 'rbind', 'cbind' or 'abind') to make another
    sparse three-dimensional array.

SIGNIFICANT USER-VISIBLE CHANGES

    o quadform
    Argument 'v=NULL' is now accepted, and interpreted as the identity matrix.

    o bilinearform
    Argument 'v=NULL' is now accepted, and interpreted as the identity matrix.

BUG FIXES

    o quadform
    Crashed if 'v' was missing.
    Fixed.

        CHANGES IN spatstat.sparse VERSION 2.0-0

OVERVIEW

    o Package adjusted to conform to the spatstat family.
    
    o New function 'gridadjacencymatrix'.

NEW FUNCTIONS

    o gridadjacencymatrix
    Given the dimensions of a rectangular grid of points,
    create the adjacency matrix for the corresponding neighbourhood
    graph, whose vertices are the grid points, and whose edges are the
    joins between neighbouring grid points. The result is a sparse matrix.

        CHANGES IN spatstat.sparse VERSION 1.3-1

OVERVIEW

    o Internal adjustments.

        CHANGES IN spatstat.sparse VERSION 1.3-0

OVERVIEW

    o Some code has been transferred to spatstat.utils.

SIGNIFICANT USER-VISIBLE CHANGES

    o RelevantNA, RelevantZero, RelevantEmpty, grokIndexVector
    These functions have been moved to the package 'spatstat.utils'.
    
        CHANGES IN spatstat.sparse VERSION 1.2-1

OVERVIEW

    o Internal bug fix.


        CHANGES IN spatstat.sparse VERSION 1.2-0

OVERVIEW

    o Efficiency improvement

SIGNIFICANT USER-VISIBLE CHANGES

    o spatstat.sparse
    Code should run faster; we have reduced the overheads in executing C code.

        CHANGES IN spatstat.sparse VERSION 1.1-1

OVERVIEW

    o Internal code improvements.


        CHANGES IN spatstat.sparse VERSION 1.1-0

OVERVIEW

    o Internal code improvements.


        CHANGES IN spatstat.sparse VERSION 1.0-9

OVERVIEW

    o Internal code improvements.


        CHANGES IN spatstat.sparse VERSION 1.0-8

OVERVIEW

    o Internal code improvements.

BUG FIXES

    o sumouter
    Crashed if 'w' contained NA values.
    Fixed.

        CHANGES IN spatstat.sparse VERSION 1.0-7

OVERVIEW

    o Internal code tweaks.


        CHANGES IN spatstat.sparse VERSION 1.0-6

OVERVIEW

    o More documentation.

SIGNIFICANT USER-VISIBLE CHANGES

    o marginSumsSparse
    This function is now documented.

        CHANGES IN spatstat.sparse VERSION 1.0-5

OVERVIEW

    o More support for complex values


SIGNIFICANT USER-VISIBLE CHANGES

    o sumouter, quadform, bilinearform
    These functions now handle complex-valued matrices and vectors.

    o marginSumsSparse
    This function now handles complex-valued sparse arrays.
    
        CHANGES IN spatstat.sparse VERSION 1.0-4

OVERVIEW

    o spatstat.sparse now 'requires' the Matrix package.

SIGNIFICANT USER-VISIBLE CHANGES

    o spatstat.sparse package
    spatstat.sparse now 'requires' the Matrix package, so that
    Matrix is loaded when spatstat.sparse is loaded.

        CHANGES IN spatstat.sparse VERSION 1.0-3

OVERVIEW

    o More documentation.

SIGNIFICANT USER-VISIBLE CHANGES

    o "[.sparse3Darray"
    The subset extraction operator is now documented.

    o "[<-.sparse3Darray"
    The subset assignment operator is now documented.

    o as.array.sparse3Darray
    This method is now documented.

    o anyNA.sparse3Darray
    This method is now documented.

    o dim.sparse3Darray, "dim<-.sparse3Darray"
    These methods are now documented.

    o dimnames.sparse3Darray, "dimnames<-.sparse3Darray"
    These methods are now documented.
    
    o sumouter
    A mathematical statement in the help file has been corrected.
    
        CHANGES IN spatstat.sparse VERSION 1.0-2

OVERVIEW

    o More documentation


SIGNIFICANT USER-VISIBLE CHANGES

    o sparse3Darray
    This function is now documented.
    
    o aperm.sparse3Darray
    This function is now documented.
    
    o as.sparse3Darray
    This function is now documented.
    
    o tensorSparse
    This function is now documented.
    
    o Math.sparse3Darray, Ops.sparse3Darray, Complex.sparse3Darray,
    Summary.sparse3Darray
    The methods for the group generics are now documented.


        CHANGES IN spatstat.sparse VERSION 1.0-1

OVERVIEW

    o Corrections to the internal structure.

    o Bug fixes.

    o More functions are documented

SIGNIFICANT USER-VISIBLE CHANGES

    o sumsymouter
    New argument 'distinct'.

BUG FIXES

    o sumsymouter
    Results were incorrect for sparse arrays in some cases:
    some contributions to the sum were omitted.
    Fixed.

        CHANGES IN spatstat.sparse VERSION 1.0-0

OVERVIEW

    o This new package has been created from
    code removed from the spatstat package.
    


