Dakota Reference Manual: compute

| Dakota Reference Manual Version 6.15 Explore and Predict with Confidence

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compute

Selection of statistics to compute at each response level

## Specification

Alias: none

Argument(s): none

Default: probabilities

Child Keywords:

| Required/Optional | Description of Group | Dakota Keyword | Dakota Keyword Description
--- | --- | --- | --- | ---
| Required (Choose One) | Statistics to Compute (Group 1) | probabilities | Computes probabilities associated with response levels
gen_reliabilities | Computes generalized reliabilities associated with response levels
| Optional | system | Compute system reliability (series or parallel)

## Description

The `compute` keyword is used to select which forward stastical mapping is calculated at each response level.

Default Behavior

If `response_levels` is not specified, no statistics are computed. If `response_levels` is specified but `compute` is not, probabilities will be computed by default. If both `response_levels` and `compute` are specified, then on of the following must be specified: `probabilities`, `reliabilities`, or `gen_reliabilities`.

Expected Output

The type of statistics specified by `compute` will be reported for each response level.

Usage Tips

CDF/CCDF probabilities are calculated for specified response levels using a simple binning approach.

CDF/CCDF reliabilities are calculated for specified response levels by computing the number of sample standard deviations separating the sample mean from the response level.

## Examples

    method
      sampling
        sample_type random
        samples = 100 seed = 1
        complementary distribution
        response_levels = 3.6e+11 4.0e+11 4.4e+11
                          6.0e+04 6.5e+04 7.0e+04
                          3.5e+05 4.0e+05 4.5e+05
        compute reliabilities