Dakota Reference Manual: regression_diagnostics

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regression_diagnostics

Turn on regression diagnostics

## Specification

Alias: none

Argument(s): none

Default: no regression diagnostics

## Description

When `regression_diagnostics` (NL2SOL's `rdreq`) is specified and a positive-definite final Hessian approximation H is computed, NL2SOL computes and prints a regression diagnostic vector RD such that if omitting the i-th observation would cause alpha times the change in the solution that omitting the j-th observation would cause, then RD[i] = |alpha| RD[j]. The finite-difference step-size tolerance affecting H is fd_step_size (NL2SOL's `delta0` and `dltfdc`).