Sha256: fbb70d48735bc2967133ab505d6086c6e8d8c330767e9c2c2623dcaefb846014
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Contents
module Dydx
module Algebra
class Inverse
include Helper
attr_accessor :x, :operator
def initialize(x, operator)
@x, @operator = x, operator
end
def to_s
case operator
when :+ then "( - #{x} )"
when :* then "( 1 / #{x} )"
end
end
def subst(hash = {})
case operator
when :+ then x.subst(hash) * -1
when :* then x.subst(hash) ** -1
end
end
def to_f
case operator
when :+ then x.to_f * -1
when :* then x.to_f ** -1
end
end
def differentiate(sym = :x)
case operator
when :+
inverse(x.differentiate(sym), :+)
when :*
inverse(x.differentiate(sym) * inverse(x ** 2, :*), :+)
end
end
alias_method :d, :differentiate
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems