Type:
Class

mathn

mathn is a library for changing the way Ruby does math. If you need more precise rounding with multiple division or exponentiation operations, then mathn is the right tool.

Without mathn:

3 / 2 => 1 # Integer

With mathn:

3 / 2 => 3/2 # Rational

mathn features late rounding and lacks truncation of intermediate results:

Without mathn:

20 / 9 * 3 * 14 / 7 * 3 / 2 # => 18

With mathn:

20 / 9 * 3 * 14 / 7 * 3 / 2 # => 20

When you require 'mathn', the libraries for Prime, CMath, Matrix and Vector are also loaded.

Copyright

Author: Keiju ISHITSUKA (SHL Japan Inc.)

Document-class: FloatDomainError

Raised when attempting to convert special float values (in particular infinite or NaN) to numerical classes which don't support them.

Float::INFINITY.to_r

raises the exception:

FloatDomainError: Infinity
abs2

num.abs2 â real Instance Public methods Returns square of self.

2015-04-22 23:29:35
singleton_method_added

singleton_method_added(p1) Instance Public methods Trap attempts to add methods

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zero?

num.zero? â true or false Instance Public methods Returns true

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quo

num.quo(numeric) â real Instance Public methods Returns most exact division

2015-04-23 00:59:06
fdiv

num.fdiv(numeric) â float Instance Public methods Returns float division

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-@

-num â numeric Instance Public methods Unary MinusâReturns the receiver's

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phase

num.phase â 0 or float Instance Public methods Returns 0 if the value is positive

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denominator

num.denominator â integer Instance Public methods Returns the denominator

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truncate

num.truncate â integer Instance Public methods Returns num truncated

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<=>

number other â 0 or nil Instance Public methods Returns zero if number

2015-04-22 23:17:41