Version 1.0b1 API Documentation generated by Endo 2006-08-14

Class numpy.lib.polynomial.poly1d

A one-dimensional polynomial class.

p = poly1d([1,2,3]) constructs the polynomial x**2 + 2 x + 3

p(0.5) evaluates the polynomial at the location
p.r  is a list of roots
p.c  is the coefficient array [1,2,3]
p.order is the polynomial order (after leading zeros in p.c are removed)
p[k] is the coefficient on the kth power of x (backwards from
     sequencing the coefficient array.

polynomials can be added, substracted, multplied and divided (returns
     quotient and remainder).
asarray(p) will also give the coefficient array, so polynomials can
     be used in all functions that accept arrays.

p = poly1d([1,2,3], variable='lambda') will use lambda in the
string representation of p.

Contents:
• Attributes
• Methods

Attributes

• coeffs

  coeffs = None
  
  

• order

  order = None
  
  

• variable

  variable = None
  
  

Method summary

• __add__(self, other)
• __array__(self, t = None)
• __call__(self, val)
• __div__(self, other)
• __eq__(self, other)
• __getattr__(self, key)
• __getitem__(self, val)
• __init__(self, c_or_r, r = 0, variable = None)
• __len__(self)
• __mul__(self, other)
• __ne__(self, other)
• __pow__(self, val)
• __radd__(self, other)
• __rdiv__(self, other)
• __repr__(self)
• __rmul__(self, other)
• __rsub__(self, other)
• __setattr__(self, key, val)
• __setitem__(self, key, val)
• __str__(self)
• __sub__(self, other)
• deriv(self, m = 1)
• integ(self, m = 1, k = 0)

Methods

• __add__(self, other)
• __array__(self, t = None)
• __call__(self, val)
• __div__(self, other)
• __eq__(self, other)
• __getattr__(self, key)
• __getitem__(self, val)
• __init__(self, c_or_r, r = 0, variable = None)
• __len__(self)
• __mul__(self, other)
• __ne__(self, other)
• __pow__(self, val)
• __radd__(self, other)
• __rdiv__(self, other)
• __repr__(self)
• __rmul__(self, other)
• __rsub__(self, other)
• __setattr__(self, key, val)
• __setitem__(self, key, val)
• __str__(self)
• __sub__(self, other)
• deriv(self, m = 1)

  Return the mth derivative of this polynomial.

• integ(self, m = 1, k = 0)

  Return the mth analytical integral of this polynomial. See the documentation for polyint.