quadratic

quadratic, an R library which computes the roots of a quadratic equation ax^2+bx+c=0.

Licensing:

Copyright 2016 James P. Howard, II

The computer code and data files on this web page are distributed under the BSD-2-Clause license.

Languages:

quadratic is available in an R version.

Related Data and Programs:

quadratic_test

Author:

Original R code by James Howard; Modifications by John Burkardt.

Reference:

1. James Howard,
   Computational Methods for Numerical Analysis with R,
   CRC Press, 2017,
   ISBN13: 978-1-4987-2363-3.
2. https://CRAN.R-project.org/package=cmna

Source Code:

• quadratic.R, uses the traditional formula.
• quadratic2.R, uses a formula less susceptible to roundoff.