final_moments
Output moments of the specified type and include them within the set of final statistics.
Specification
Alias: None
Arguments: None
Default: standard
Child Keywords:
Required/Optional |
Description of Group |
Dakota Keyword |
Dakota Keyword Description |
---|---|---|---|
Required (Choose One) |
Final moment type |
Omit moments from the set of final statistics. |
|
Output standardized moments and include them within the set of final statistics. |
|||
Output central moments and include them within the set of final statistics. |
Description
When performing a nested study that may employ moment statistics on the inner loop, it can be desirable to control the type of these moments. The final_moments
specification supports options of none
, standard
(default), or central
, corresponding to omission of moments, standardized moments (mean, standard deviation, skewness, and excess kurtosis), or central moments (mean, variance, 3rd central, and 4th central).
The presence or omission of moment results in the final statistics influences the outer level mappings in the case of a nested study. For example, final_moments
none
can allow for a more compact specification of primary and/or secondary response mappings.
Examples
The following method specification overrides the default to print central
moments and include them in the set of final statistics.
method,
sampling
samples = 50 seed = 1234
response_levels = 3.6e+11 1.2e+05 3.5e+05
final_moments central
Overriding the default to none
as follows:
method,
sampling
samples = 50 seed = 1234
response_levels = 3.6e+11 1.2e+05 3.5e+05
final_moments none
allows associated nested model mappings to be simplified from:
model
nested
sub_method_pointer = 'UQ'
primary_response_mapping = 0. 0. 1. 0. 0. 1. 0. 0. 0.
secondary_response_mapping = 0. 0. 0. 0. 0. 0. 0. 0. 1.
to a more compact version focused only on the response level mappings (two leading zeros per response function for moment mappings have been removed):
model
nested
sub_method_pointer = 'UQ'
primary_response_mapping = 1. 1. 0.
secondary_response_mapping = 0. 0. 1.