[Pdl-general] PDL-2.016 released

[Chris M. <dev...@gm...>]

Announcing the release of PDL-2.016 to CPAN.
It should be appearing at a mirror near you
shortly.  This release fixes some bugs, adds
some features and addresses some build problems
that emerged since PDL-2.015 last November.

It would not have happened without the work
of some diligent PDL developers and users with
special acknowledgement to contributions from
Derek Lamb, Craig DeForest, and kmx.

Enjoy!
The PDL Development Team



v2.016 2016-05-30 10:22:04-04:00

General Notes:

  * This is version 2.016 of the Perl Data Language.

  * Bugs fixed:
     417   Perl 5.22: + GSL 2.1 fails to build
     408   PDL::GSL::RNG set_seed minor improvement
     407   Build failures with GSL 2.1
     416   PDL::PP creates .pm & .xs files before pp_done is called
     414   ccNcompt (i.e. cc4compt and cc8compt) breaks with byte data type

  Highlights:

   * All collapse operators now have "<name>over" equivalent names.
     This ends an API wart in which most, but not all, of the collapse
     operators had a short form that did full collapse and a long form
     that did 1-D collapse only (e.g. "and" collapses to a point,
     while "andover" collapses by one dimension).  The exceptions are
     left in for legacy code, but now have regularized "-over" forms
     as well:

        average       -> avgover
        daverage      -> davgover
        maximum       -> maxover
        maximum_ind   -> maxover_ind
        maximum_n_ind -> maxover_n_ind
        minmaximum    -> minmaxover
        minimum       -> minover
        minimum_ind   -> minover_ind
        minimum_n_ind -> minover_n_ind

   * PDL::Transform image resampling now handles bad values in
     images.  In particular, the `h' and `j' (optimized filter)
     resampling methods properly skip bad values in the image,
     marking output pixels bad if more than 1/3 of the weighted
     values associated with that output pixel are bad.

   * PDLs with dataflow can now be reshaped.  The dataflow
     connection gets severed by the reshape operation.

   * PDL::IO::FITS now works better with RICE-compressed FITS
     images, such as are produced by NASA's SDO project.

         - The NAXIS* header keywords are now replaced by their
           ZNAXIS* equivalents, so the NAXIS fields in the header
           are correct after the image is read in.

         - The Z*, TFIELDS, TTYPE*, and TFORM* keywords are now
           deleted from the header object, so that the uncompressed,
           loaded image does not have leftover compression headers.

   * The language preprocessor PDL::PP now does not automatically
     call pp_done for modules that do not call pp_done themselves.
     This new, stricter behavior requires module authors to call
     pp_done at the end of their PDL::PP file.  This prevents
     partially-complete .xs and .pm files from being written if
     there is a module build error.

   * PDL::GSLSF modules have several fixes/improvements to support
     building against GSL 2.0:

         - New calling convention for gsl_sf_ellint_D.
         - New functions gsl_sf_legendre_array
             and gsl_sf_legendre_array_index.
         - Deprecated gsl_sf_legendre_Plm_array
             and gsl_sf_legendre_sphPlm_array.
         - New tests for new legendre functions.
         - Test requires all PDL::GSLSF modules
             to successfully load.

   * PDL::GSL::RNG now allows chaining for the set_seed() method:
     e.g. $rng = PDL::GSL::RNG->new(..)->set_seed(..)

   * PDL::Image2D's ccNcompt connected-component analysis code now
     returns types that are >= long, to avoid common overflow errors.

   * PDL::whichND returns PDLs of Indx type, to avoid overflows.

   * Empty piddles are handled slightly differently now by
     PDL::info and `help vars'.  Empty piddles are different
     from null piddles, and now generate different info strings.
     (null piddles lack data or dimensions; empty piddles have
     at least one dimension of size 0).

   * PDL::Fit::LM:

         - Documentation has been clarified relating to input
             data uncertainties and weighting of the fit.
         - A small test suite has been added.

   * There is now a .gitattributes file so GitHub repo language
     stats are more accurate.

   * The PDL SF/GitHub deveolpment workflow is integrated into
     the DEVELOPMENT docs.