continuation

continuation, a MATLAB code which implements the continuation method for a simple 2D problem, which involves finding a point on the unit circle, and then finding a sequence of nearby points which trace out the full curve, using only the information available in the implicit definition of the curve from the function f(x,y)=x^2+y^2-1.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

continuation is available in a MATLAB version and an Octave version.

Related Data and Programs:

continuation_test

test_con, a MATLAB code which implements test problems for numerical continuation.

Reference:

1. Cor den Heijer, Werner Rheinboldt,
   On Steplength Algorithms for a Class of Continuation Methods,
   SIAM Journal on Numerical Analysis,
   Volume 18, Number 5, October 1981, pages 925-947.
2. Werner Rheinboldt,
   Solution Field of Nonlinear Equations and Continuation Methods,
   SIAM Journal on Numerical Analysis,
   Volume 17, Number 2, April 1980, pages 221-237.
3. Werner Rheinboldt,
   Numerical Analysis of Continuation Methods for Nonlinear Structural Problems,
   Computers and Structures,
   Volume 13, 1981, pages 103-114.
4. Werner Rheinboldt, John Burkardt,
   A Locally Parameterized Continuation Process,
   ACM Transactions on Mathematical Software,
   Volume 9, Number 2, June 1983, pages 215-235.
5. Werner Rheinboldt, John Burkardt,
   Algorithm 596: A Program for a Locally Parameterized Continuation Process,
   ACM Transactions on Mathematical Software,
   Volume 9, Number 2, June 1983, pages 236-241.

Source Code:

• newton.m, uses Newton's method to solve the augmented nonlinear system.
• r8vec_print.m, prints an R8VEC.
• step.m, takes one continuation step.
• tangent.m, computes the tangent vector.