Overview of DEQSOL
How to use DEQSOL to solve/fit differential equations
- Select a chosen set of differential equations from a DLL
or ASCII text model file and control DEQSOL interactively
or from data files, configure/initialise, or parameter/limits files.
- Select the integration method to use (i.e. BDF/Adams).
Note that some special releases of DEQSOL offer a wider
choice of integration methods.
- Select tolerances/error-test/transformation as required.
- Select a range of integration and the number of points.
Note that integration will always be advanced from x = 0,
irrespective of the range chosen for simulation,
fitting, or plotting.
- Select parameters p(i) and initial conditions y0(i).
Note that the y0(i) will always be assumed to refer to
y(i) values at x = 0.
- Select a sub-set of y(i) components for special attention
if there are a large number of equations.
This is essential if there are more than twleve equations.
- Plot/tabulate/file the specially selected y(i) solutions.
- Compare the result with alternative solutions (e.g. steady
state solutions or approximate integrals).
Note that this procedure is only available in some
special releases of DEQSOL.
- Read in data then plot/overlay before curve-fitting.
- You can use a configure/initialise file to set all the
parameters, limits, methods, time range, etc. but this can
be appended to user-supplied model files.
Also
parameter-limits files can be used to just set parameters and limits.
- For details of how to supply differential equations as a
DLL or ASCII text file, read the readme.? files, the manual
and the test example files deqmod?.tf?.
Back to Help Menu or End Help