Dakota Reference Manual: step_vector

| Dakota Reference Manual Version 6.15 Explore and Predict with Confidence

- Main Page
- Related Pages

All Pages
step_vector

Size of step for each variable

## Specification

Alias: none

Argument(s): REALLIST

## Description

The `step_vector` keyword specifies how much each variable will be incremented in a single step.

`step_vector` works in conjunction with `num_steps`, which determines the number of steps taken during the `vector_parameter_study`. If instead of `step_vector`, `final_point` is specified with `num_steps`, Dakota will infer the step sizes.

Entries in the `step_vector` are the actual amounts by which continuous and range variables are incremented. For set variables, `step_vector` entries are interpreted as indexes into the underlying set.

Default Behavior

The user is required to specify either `final_point` or `step_vector`. There is no default definition for the vector.

## Examples

    variables
      continuous_design 1
        initial_point 1.0
        descriptors 'x1'
      discrete_design_set
        string 1
         elements 'bar' 'baz' 'foo' 'fuzz'
         initial_point 'bar'
         descriptors 's1'

    method
      vector_parameter_study
        num_steps = 3
        # Add 2.0 to x1 and increment s1 by 1 element in each step
        step_vector =    2.0      1