Statistics::R::REXP::Null - the R null object
version 0.10
use Statistics::R::REXP; my $null = Statistics::R::REXP::Null->new(); say $rexp->is_null; print $rexp->to_pl;
An object of this class represents the null R object (NILSXP). The null object does not have a value or attributes, and trying to set them will cause an exception.
NILSXP
Statistics::R::REXP::Null inherits from Statistics::R::REXP and adds no methods of its own.
Statistics::R::REXP::Null
The Perl value of NULL is undef.
NULL
undef
Null objects have no attributes, so the attributes accessor always returns undef.
Classes in the REXP hierarchy are intended to be immutable. Please do not try to change their value or attributes.
REXP
There are no known bugs in this module. Please see Statistics::R::IO for bug reporting.
See Statistics::R::IO for support and contact information.
Davor Cubranic <cubranic@stat.ubc.ca>
This software is Copyright (c) 2014 by University of British Columbia.
This is free software, licensed under:
The GNU General Public License, Version 3, June 2007
To install Statistics::R::IO, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Statistics::R::IO
CPAN shell
perl -MCPAN -e shell install Statistics::R::IO
For more information on module installation, please visit the detailed CPAN module installation guide.