| | DEFUN_DLD (lsode_options, args,,"-*- texinfo -*-\n\
@deftypefn {Loadable Function} {} lsode_options (@var{opt}, @var{val})\n\
When called with two arguments, this function\n\
allows you set options parameters for the function @code{lsode}.\n\
Given one argument, @code{lsode_options} returns the value of the\n\
corresponding option. If no arguments are supplied, the names of all\n\
the available options and their current values are displayed.\n\
\n\
Options include\n\
\n\
@table @code\n\
@item \"absolute tolerance\"\n\
Absolute tolerance. May be either vector or scalar. If a vector, it\n\
must match the dimension of the state vector.\n\
@item \"relative tolerance\"\n\
Relative tolerance parameter. Unlike the absolute tolerance, this\n\
parameter may only be a scalar.\n\
\n\
The local error test applied at each integration step is\n\
\n\
@example\n\
@group\n\
abs (local error in x(i)) <= ...\n\
rtol * abs (y(i)) + atol(i)\n\
@end group\n\
@end example\n\
@item \"integration method\"\n\
A string specifying the method of integration to use to solve the ODE\n\
system. Valid values are\n\
\n\
@table @asis\n\
@item \"adams\"\n\
@itemx \"non-stiff\"\n\
No Jacobian used (even if it is available).\n\
@item \"bdf\"\n\
@item \"stiff\"\n\
Use stiff backward differentiation formula (BDF) method. If a\n\
function to compute the Jacobian is not supplied, @code{lsode} will\n\
compute a finite difference approximation of the Jacobian matrix.\n\
@end table\n\
@item \"initial step size\"\n\
The step size to be attempted on the first step (default is determined\n\
automatically).\n\
@item \"maximum order\"\n\
Restrict the maximum order of the solution method. If using the Adams\n\
method, this option must be between 1 and 12. Otherwise, it must be\n\
between 1 and 5, inclusive.\n\
@item \"maximum step size\"\n\
Setting the maximum stepsize will avoid passing over very large\n\
regions (default is not specified).\n\
@item \"minimum step size\"\n\
The minimum absolute step size allowed (default is 0).\n\
@item \"step limit\"\n\
Maximum number of steps allowed (default is 100000).\n\
@end table\n\
@end deftypefn") |
