provides details about an integration performed by either d02pec
and its associated functions (d02pec
) solve the initial value problem for a first-order system of ordinary differential equations. The functions, based on Runge–Kutta methods and derived from RKSUITE (see Brankin et al. (1991)
is the vector of
solution components and
is the independent variable.
After a call to d02pec
can be called to obtain information about the cost of the integration and the size of the next step.
Brankin R W, Gladwell I and Shampine L F (1991) RKSUITE: A suite of Runge–Kutta codes for the initial value problems for ODEs SoftReport 91-S1 Southern Methodist University
When a secondary integration has taken place, that is when global error assessment has been specified using
in a prior call to d02pqc
, then the approximate number of evaluations of
used in this secondary integration is given by