dqed_test

dqed_test, a Fortran90 code which calls dqed(), which solves (square) systems of nonlinear equations, or minimizes the residual in a set of nonlinear equations, using least squares, by Richard Hanson and Fred Krogh.

Licensing:

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

Related Data and Programs:

dqed, a Fortran90 code which solves (square) systems of nonlinear equations, or minimizes the residual in a set of nonlinear equations, using least squares, by Richard Hanson and Fred Krogh.

Source Code:

Problem 1 tries to fit data for a model of the heart. Several datasets are examined, exact and approximate jacobians are compared, and two equations are tried as constraints instead of equations.

• dqed_test1.f90, a sample problem.
• dqed_test1.sh, runs the test.
• dqed_test1_input.txt, input for the sample problem.
• dqed_test1.txt, sample problem output.

Problem 2 tries to fit data.

• dqed_test2.f90, a sample problem.
• dqed_test2.sh, runs the test.
• dqed_test2.txt, sample problem output.

Problem 3 tries to fit data.

• dqed_test3.f90, a sample problem.
• dqed_test3.sh, runs the test.
• dqed_test3.txt, sample problem output.

Problem 4 is like problem 3, but is set up to solve a problem involving the absorption of carbon and nitrogen isotopes by an alligator from its prey.

• dqed_test4.f90, a sample problem.
• dqed_test4.sh, runs the test.
• dqed_test4.txt, sample problem output.

Problem 5 shows how, if the nonlinear constrained system to be solved is actually a LINEAR constrained system, the user may call the DBOLS routine directly.

• dqed_test5.f90, a sample problem.
• dqed_test5.sh, runs the test.
• dqed_test5.txt, sample problem output.