Class: Malge::ErrorFittedFunction::AXInv4

Inherits:

Malge::ErrorFittedFunction

• Object
• Malge::ErrorFittedFunction
• Malge::ErrorFittedFunction::AXInv4

Defined in:

lib/malge/errorfittedfunction/axinv4.rb

Overview

Assumed y = a/(x**4)

Instance Attribute Summary

Attributes inherited from Malge::ErrorFittedFunction

#coefficients, #diff_abs_pairs, #raw_pairs

Instance Method Summary

• #equation ⇒ Object
• #expected_error(x) ⇒ Object
• #fit ⇒ Object
• #most_strict_pair ⇒ Object
• #x(y) ⇒ Object

  y = a/x x = a/y.

Methods inherited from Malge::ErrorFittedFunction

#count_equal_under_over, #initialize, #summary, #variance

Constructor Details

This class inherits a constructor from Malge::ErrorFittedFunction

Instance Method Details

#equation ⇒ Object

# File 'lib/malge/errorfittedfunction/axinv4.rb', line 13

def equation
  sprintf("%f / (x**4)", * @coefficients)
end

#expected_error(x) ⇒ Object

# File 'lib/malge/errorfittedfunction/axinv4.rb', line 17

def expected_error(x)
  @coefficients[0] / (x**4)
end

#fit ⇒ Object

# File 'lib/malge/errorfittedfunction/axinv4.rb', line 8

def fit
  inv_pairs =  @diff_abs_pairs.map {|pair| [1.0/(pair[0]**4), pair[1]]}
  @coefficients = Malge::LeastSquare.least_square_proportional(inv_pairs)
end

#most_strict_pair ⇒ Object

# File 'lib/malge/errorfittedfunction/axinv4.rb', line 27

def most_strict_pair
  @raw_pairs.max_by{ |pair| pair[0] }
end

#x(y) ⇒ Object

y = a/x x = a/y

# File 'lib/malge/errorfittedfunction/axinv4.rb', line 23

def x(y)
  return (@coefficients[0] / y) ** (1.0/4.0)
end