Changes in v2.08 - Jonathan "Duke" Leto April 11 2011

• Fix t/matlab.t failing on Windows (RT #64629)
• Applied patch from RT #51669 (POD rendering)
• Applied patch from RT #61334 (fix croak in new_from_string)
• Make reference check less strict in newfrom_row_or_cols (requested by MJD)

Changes in v2.06 - leto
Sun Apr 13 19:57:25 EDT 2008

• added submatrix() (exactly the same behavior as sec() from PDL, for 2-D matrices ) Backstory: I was reading through "Mastering Algorithms with Perl" and it says that it is not possible to do this in Math::MatrixReal without iterating through all the elements of the matrix. Now it is wrong.
• t/submatrix.t created
• t/decompose_LR.t created
• !!!NEED documentation for submatrix()

Changes in v2.05 - leto
Fri Feb 29 21:58:47 EST 2008

• fix accidental use of "our" that broke old (like 5.5) Perl's Thanks to srezic@cpan.org for the first FAILed report
• added $matrix->display_precision($n) to easily change the output to something a bit easier to read $a->display_precision(0) is useful for printing integer matrices nicely
• NEED print_precision() docs near stringify
• t/display_precision.t created
• example/ directory created with some benchmark scripts

Changes in v2.04 - leto
Sat Feb 23 20:59:08 EST 2008

• fixed pod errors
• $a->length does row+col vectors now
• converted all tests except ext1.t to Test::More and added some overall Kwalitee
• fixed error with doing $string = $matrix . "\nStuff\n";
• new funcion new_tridiag
• $matrix->min and $matrix->max now return the min/max element of a matrix
• new function new_random added which looks like (with default options shown )

# returns $n x $m matrix of real numbers between 0 and 10

new_random($n,$m, { symmetric => 0, tridiag => 0, bounded_by => [0,10], integer => 0 )

new_random($n, %options ) # returns a square matrix

      This has proven to be pretty useful in the unit tests of Math::MatrixReal so I figured 
      others may want an easy way to generate a random matrix of your own flavor

• t/rand.t created
• t/tridiag.t created
• t/stringify.t created
• t/minimax.t created
• t/positive.t created
• t/gsm.t created
• t/similar.t created

Changes in v2.03 - leto
Sun Jan 27 13:19:55 EST 2008

• now using Module::Build, so Math::MatrixReal should in theory be able to compile on systems without make, please test and let me know!
• new concatenation operator ".", i.e $c = $a . $b concatenates two matrices side-by-side
• t/concat.t created
• new function assign_row
• beginning of a test suite overhaul (converting to Test::More )

Changes in v2.02 - leto
Sat Jun 09 12:29:08 EDT 2007

• Fixed the overloading for the division operator which did not recognize $a/2, reported by Daniel Brooks <db48x@yahoo.com>
• Added support for matrix division notation, so that $a/$b = $a$b*(-1) when $a and $b are square matrices
• t/div.t created

Changes in v2.01 - msouth
Fri Aug 19 23:40:24 EDT 2005

• Changed versioning format to leading zero after the dot to make more minor versions possible this time
• Integration of Math::MatrixReal::Ext1 0.07
  • merged new_from_cols and new_from_rows into one private function which is called by wrappers with the old names
  • added tests to exercise all of the known failure modes in new_from_{rows,cols} calls
• Fixes for POD
  • added a much needed =over 4 to the start of the POD
  • removed tabs
• reformatted indentation of the all of the code to 4 space indent (from a mixture of tabs, 8 space, 4 space, and 2 space)

Changes in v1.9 - leto
Wed May 15 03:19:34 EST 2002

• as_yacas() function added
• t/yacas.t created
• Fixed issue with infinity norm and Irix, thanks to Allen Smith <easmith@beatrice.rutgers.edu> and the CPAN testers

Changes in v1.8 -- leto
Sat Mar 23 00:13:48 EST 2002

• as_matlab() function added
• as_scilab() function added
• t/matlab.t created
• is_row_vector() function added
• is_col_vector() function added
• t/isrowcol.t created
• norm_p() function added
• norm_frobenius () function added
• t/vecnorm.t created

Changes in v1.7 -- leto
Fri Mar 15 13:09:49 EST 2002

• each() and each_diag() are now one-based for consistency
• removed trace() comments
• aslatex() function created
• t/latex.t created
• t/bool.t created
• t/periodic.t created
• t/rank.t created
• new_from_string() shouldn't care about the case of the scientific E

  notation (pointed out by Jim Bowery <jim_bowery@hotmail.com>)

• t/scinotation.t created
• is_idempotent() function added
• is_periodic() function added
• rank_LR() function added
• make is_orthogonal return 0 instead of croak when matrix

  is not quadratic

Changes in v1.6 -- leto
Sat Feb 16 09:46:51 EST 2002

• is_skew_symmetric() function added
• fixed logic error is sym_eigenvalues ( didn't notice if not square! )
• spectral_radius() function added
• is_binary() function added
• is_LR() function added
• t/spectral.t created
• t/binary.t created
• t/is_LR.t created
• t/gramian.t created
• is_skew_symmetric() tests added to t/symmetric.t
• is_gramian() function added

Changes in v1.5 -- leto
Sat Jan 12 04:20:48 EST 2002

• t/inverse.t test 6 was numerically instable, commented out

  I ran it 10000 times and got values from 1e-2 to 1e-16, this caused the test to randomly fail, because it checked that the value was less than 1e-10 I did not notice this problem because my default perl install has USE_LONG_DOUBLE

• changed epsilon to be 1e-8 in funcs.pl ( was 1e-10)

Changes in v1.4 -- leto
Jan 10 2002

• Steffen Beyer gave maintainer-ship to Jonathan Leto
• exponent() function added
• trace() function added
• "**" and "**=" overloaded to exponent()
• $matrix ** -1 is now a quick way to compute the inverse, if it exists
• new_from_rows and new_from_cols integrated from Math::MatrixReal::Ext1
• is_diagonal() function added
• is_tridiagonal() function added
• each() function added
• each_diag() function added
• put functions used by all the test scripts into funcs.pl instead

  of all of them having copy+paste code

• t/inverse.t created
• t/diag.t created
• t/exponent.t created
• t/trace.t created
• t/ext1.t created
• some documentation spelling errors corrected
• perl operators exp(),sin(),cos() overloaded

  only works with diagonal matrices for now

• new_diag() function added
• is_upper_triangular() function added
• is_lower_triangular() function added
• t/triang.t created
• t/det.t created
• inverse() function added
• det() function added

  should be much faster for diagonal and triangular matrices

• tri_diagonalize() tri_eigenvalues() and now do real tridiag check, as per TODO
• t/minor.t created
• t/cofactor.t created
• t/adjoint.t created
• t/quadratic.t created
• norm_sum() function added
• t/norm.t created
• check if $rows and $cols are integers in new()
• t/condition.t created
• t/product.t created
• eigenvalues() function added
• t/eigen_NxN.t - added test for eigenvalues()
• swap_row() function added
• swap_col() function added
• t/swap.t created
• t/orthogonal.t created
• is_orthogonal() function added