NAME

Data::Frame::Partial::Eval - Partial class for data frame's eval method

VERSION

version 0.0053

SYNOPSIS

    $df->eval_tidy($x);

DESCRIPTION

The eval_tidy method is similar to R's data frame tidy evaluation.

METHODS

eval_tidy

    eval_tidy($x)

This method is similar to R's data frame tidy evaluation.

Depending on $x,

  • $x is a reference but not an Eval::Quosure object

    Return $x.

  • $x is a column name of the data frame

    Return the column.

  • For other $x,

    Coerce $x to an an Eval::Quosure object, add columns of the data frame into the quosure object's captured variables, and evaluate the quosure object. For example,

        # $df has a column named "foo"
        $df->eval_tidy('$foo + 1');
    
        # above is equivalent to below
        $df->at('foo') + 1;

SEE ALSO

Data::Frame, Eval::Quosure

AUTHORS

  • Zakariyya Mughal <zmughal@cpan.org>

  • Stephan Loyd <sloyd@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2014, 2019 by Zakariyya Mughal, Stephan Loyd.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.