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André Fernandes dos Santos > Text-Math-NumExp-0.01_12 > Text::Math::NumExp
Module Version: 0.01_12

# NAME

Text::Math::NumExp - Text::Math::NumExp - Find numeric expressions in text.

version 0.01_12

# SYNOPSIS

``` use Text::Math::NumExp;

my \$text = "Light travels at 3x10[8] m/s."
norm_numexp(\$text);
# "Light travels at 3x10^8 m/s."

\$text = "The program used for the ampliﬁcation was as follows:
5 min at 94°C, followed by 50 cycles consisting of 30s
at 94°C, 30s at 62°C, and 30s at 72°C";

find_numexp(\$text);

# [ { length => 1, offset =>  54, text => 5,           value => 5     },
#   { length => 2, offset =>  63, text => 94,          value => 94    },
#   { length => 2, offset =>  81, text => 50,          value => 50    },
#   { length => 9, offset => 105, text => "30s at 94", value => undef },
#   { length => 9, offset => 119, text => "30s at 62", value => undef },
#   { length => 9, offset => 137, text => "30s at 72", value => undef },
# ]

\$text = "One plus one equals two.";
find_numwords(\$text);

# [ { length => 3, offset =>  0, text => "One", value => 1 },
#   { length => 3, offset =>  9, text => "one", value => 1 },
#   { length => 3, offset => 20, text => "two", value => 2 },
# ] ```

# DESCRIPTION

This module searches for numbers and numeric expressions in a text, including:

- numbers (e.g 30.000, 3.4, -20)
- spelled-out numbers (e.g. "one million", "three")
- complex numeric expressions (e.g. 1.5x10^-5)

# SUBROUTINES/METHODS

## find_numexp

Finds numeric expressions in text.

## find_numwords

Finds spelled-out numbers in text.

## solve

Returns the value of a numerical expression. Retuns undef if expression is not solvable.

## norm_numexp

Normalizes common numerical expression patterns (including Unicode characters).

# AUTHOR

Andre Santos <andrefs@cpan.org>