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.
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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.
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.
Problem 2 tries to fit data.
Problem 3 tries to fit data.
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.
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.