Dakota Reference Manual: sparse_grid_level_sequence

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sparse_grid_level_sequence

Sequence of sparse grid levels used in a multi-stage expansion

## Specification

Alias: none

Argument(s): INTEGERLIST

Child Keywords:

| Required/Optional | Description of Group | Dakota Keyword | Dakota Keyword Description
--- | --- | --- | --- | ---
| Optional | dimension_preference | A set of weights specifying the realtive importance of each uncertain variable (dimension)
| Optional (Choose One) | Group 1 | nodal | Employ a nodal sparse grid construction in stochastic collocation
hierarchical | Employ a hierarchical sparse grid construction
| Optional (Choose One) | Quadrature Rule Growth (Group 2) | restricted | Restrict the growth rates for nested and non-nested rules can be synchronized for consistency.
unrestricted | Overide the default restriction of growth rates for nested and non-nested rules that are by defualt synchronized for consistency.
| Optional (Choose One) | Quadrature Rule Nesting (Group 3) | nested | Enforce use of nested quadrature rules if available
non_nested | Enforce use of non-nested quadrature rules

## Description

Each level entry of the `sparse_grid_level_sequence` applies to one expansion within a multi-stage expansion. Current multi-stage expansions that support sparse grid level sequences include multilevel polynomial chaos, multifidelity polynomial chaos, or multifidelity stochastic collocation expansions.

If adaptive refinement is active, then this sequence specifies the starting point for each level within either an individual or integrated refinement approach.

A corresponding scalar specification is documented at, e.g., sparse_grid_level

## See Also

These keywords may also be of interest:

- sparse_grid_level