Statistics::R::REXP::Expression - an R expression vector
version 1.0002
use Statistics::R::REXP::Expression # Representation of the R call C<expresson(1 + 2))>: my $vec = Statistics::R::REXP::Expression->new([ Statistics::R::REXP::Language->new([ Statistics::R::REXP::Symbol->new('+'), Statistics::R::REXP::Double->new([1]), Statistics::R::REXP::Double->new([2]) ])]); print $vec->elements;
An object of this class represents an R expression vectors (EXPRSXP). These objects represent a list of calls, symbols, etc., for example as returned by calling R function parse or expression.
EXPRSXP
parse
expression
Statistics::R::REXP:Expression inherits from Statistics::R::REXP::List, with no added restrictions on the value of its elements.
Statistics::R::REXP:Expression
SEXPTYPE of expressions is EXPRSXP.
Perl value of the expression vector is an array reference to the Perl values of its elements. (That is, it's equivalent to map {$_-to_pl}, $vec->elements>.) Unlike List, elements that are atomic vectors of length 1 are still represented as a one-element array reference, rather than scalar values.
elements
map {$_-
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) 2017 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.