Parent Command
all thirdlevel commands in block > PARAMETER
Subcommand

Description
This command specifies the perturbation factor alpha for numerical computation of the Jacobian
matrix. The columns of the Jacobian matrix are calculated by perturbing the corresponding
parameter p by a small amount dp, and taking either a forward or centered finite difference
quotient. The perturbation is usually a fraction of the parameter value itself:
Example
> PARAMETER
>> TIME at which production rate changes
>>> SOURCE: WEL_3
>>>> INDEX of array F1 : 5
>>>> initial GUESS : 1.7E8 seconds
>>>> PERTURB by constantly : 3.6E3 seconds
<<<<
<<<
<<
> COMPUTATION
>> JACOBIAN
>>> all other parameters are PERTURBed by : 2 % of their values
<<<
<<
See Also