# reduce

## Syntax

## Description

reduces a structural analysis model to the fixed interface modes in the frequency range
`Rcb`

= reduce(`structuralmodel`

,"FrequencyRange",`[omega1,omega2]`

)`[omega1,omega2]`

and the boundary interface degrees of
freedom.

reduces a thermal analysis model to the modes specified in
`Rtherm`

= reduce(`thermalmodel`

,"ModalResults",`thermalModalR`

)`thermalModalR`

. When reducing a thermal model, thermal properties of
materials, internal heat sources, and boundary conditions cannot depend on time or
temperature.

also truncates the number of modes to `Rtherm`

= reduce(`thermalmodel`

,"ModalResults",`thermalModalR`

,"NumModes",`N`

)`N`

. Using this syntax, you can
compute a larger number of modes and then use a subset of these modes to construct a
reduced-order model.

## Examples

## Input Arguments

## Output Arguments

## Version History

**Introduced in R2019b**