Dakota Reference Manual
Version 6.4
LargeScale Engineering Optimization and Uncertainty Analysis

Use AMPL to define algebraic inputoutput mappings
Alias: none
Argument(s): STRING
Default: no algebraic mappings
Dakota can evaluate algebraic inputoutput mappings using AMPL [25]. The mappings are expressed in 3 files: stub.nl
, stub.col
, and stub.row
, where stub
is a particular root name describing a particular problem. The file names are communicated to Dakota using the algebraic_mappings
keyword. It may either specify the full stub.nl
filename, or alternatively, just the stub
basename.
Dakota then extracts the input and output identifier strings from stub.col
and stub.row
and employs the AMPL solver library[28] to process the directed acyclic graphc (DAG) specification in stub.nl
. The variable and objective function names declared within AMPL should be a subset of the variable and response descriptors specified in the variables and responses blocks. Ordering is not important, as Dakota will reorder data as needed.
An interface employing both algebraic and simulationbased mappings. The results from the individual algebraic and simulation mappings are overlaid based on the variable and response descriptors used by the individual mappings.
interface, algebraic_mappings = 'ampl/fma.nl' fork analysis_driver = 'text_book' parameters_file = 'tb.in' results_file = 'tb.out'