 On 20090713, Eric Moyer <eric_moyer@...> wrote:
> I would like to suggest that the vnl_real_polynomial class
> documentation be altered to mention that in the coefficient
> array coefficients[i] is the coefficient on X^(degreei).
> I recently had a bug in my code resulting from assuming
> that coefficients[i] is the coefficient on X^(i).
Change has been made to the documentation.
Here is the current class documentation; let me know if this is OK!
=========================================
Evaluation of real polynomials at real and complex points.
vnl_real_polynomial represents a univariate polynomial with real
coefficients, stored as a vector of doubles. This allows
evaluation of the polynomial p(x) at given values of x,
or of its derivative p'(x).
The coefficients (coeffs_) are stored as a vnl_vector, where
coeffs_[n] is the coefficient of the x^(dn) term,
where d is the degree of the polynomial. Otherwise said,
the coefficients are stored starting with the highest degree term.
Roots may be extracted using the roots() method.
=========================================
 Peter.

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