NAME

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

VERSION

version 0.0049

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.