Advice
Some final advice
- Use a mixed error test unless you specifically want to fix
the correct number of decimal-places or significant-digits.
- Set TOL between 1.0E-3 and 1.0E-6 unless you really want highly
accurate (1.0E-7) or just very approximate (1.0E-2) integration.
- If you have a set of n equations but are only interested in
m components ( m =< n ) for plotting, displaying or filing,
you should select a sub-set of indices of interest.
- To fit data, use makdat to prepare files with x,y,s values
for the y(i).
Note that files can have different x-values
and can be referenced by a library file (see deqsol.tfl).
- Before fitting, you should simulate the solution to compare
data points and simulation, until a reasonable fit has been
obtained.
Then just use the fitting to refine the parameter
and initial condition estimates.
- Note that an ASCII text file must define the differential
equations as illustrated in the deqmod?.tf? test files.
The Jacobian can also be defined in this file if required.
- The last n parameters when curve fitting MUST be the n
initial y0(i) values, but they can be estimated or fixed.
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