Statistics::R::REXP::Language - an R language vector

Author

       Davor Cubranic <cubranic@stat.ubc.ca>

Bugs And Limitations

       Classes in the "REXP" hierarchy are intended to be immutable. Please do not try to change their value  or
       attributes.

       There are no known bugs in this module. Please see Statistics::R::IO for bug reporting.

Copyright And License

       This software is Copyright (c) 2017 by University of British Columbia.

       This is free software, licensed under:

         The GNU General Public License, Version 3, June 2007

perl v5.34.0                                       2022-02-10                 Statistics::R::REXP::Language(3pm)

Description

       An object of this class represents an R language vector ("LANGSXP").  These objects represent calls (such
       as model formulae), with first element a reference to the function being called, and the remainder the
       actual arguments of the call. Names of arguments, if given, are recorded in the 'names' attribute (itself
       as Statistics::R::REXP::Character vector), with unnamed arguments having name ''. If no arguments were
       named, the language objects will not have a defined 'names' attribute.

Methods

       "Statistics::R::REXP:Language" inherits from Statistics::R::REXP::Vector, with the added restriction that
       its first element has to be a Statistics::R::REXP::Symbol or another "Language" instance. Trying to
       create a Language instance that doesn't follow this restriction will raise an exception.

       sexptype
           SEXPTYPE of language vectors is "LANGSXP".

       to_pl
           Perl  value  of the language vector is an array reference to the Perl values of its "elements". (That
           is, it's equivalent to "map {$_-"to_pl}, $vec->elements>.

Name

       Statistics::R::REXP::Language - an R language vector

Support

       See Statistics::R::IO for support and contact information.

Synopsis

           use Statistics::R::REXP::Language

           # Representation of the R call C<mean(c(1, 2, 3))>:
           my $vec = Statistics::R::REXP::Language->new([
               Statistics::R::REXP::Symbol->new('mean'),
               Statistics::R::REXP::Double->new([1, 2, 3])
           ]);
           print $vec->elements;