isfinite

Determine if model has finite coefficients

Syntax

B = isfinite(sys)

B = isfinite(sys,'elem')

Description

B = isfinite(sys) returns a logical value of 1 (true) if the model sys has finite coefficients, and a logical value of 0 (false) otherwise. If sys is a model array, then B = 1 if all models in sys have finite coefficients.

B = isfinite(sys,'elem') checks each model in the model array sys and returns a logical array of the same size as sys. The logical array indicates which models in sys have finite coefficients.

Examples

Check Model for Finite Coefficients

Create model and check whether its coefficients are all finite.

sys = rss(3);
B = isfinite(sys)

B = logical
   1

The model, sys, has finite coefficients.

Check Each Model in Array

Create a 1-by-5 array of models, and check each model for finite coefficients.

sys = rss(2,2,2,1,5);
B = isfinite(sys,'elem')

B = 1x5 logical array

   1   1   1   1   1

isfinite checks each model in the model array, sys, and returns a logical array indicating which models have all finite coefficients.

Input Arguments

sys — Model or array to check

input-output model | model array

Model or array to check, specified as an input-output model or model array. Input-output models include dynamic system models such as numeric LTI models and generalized models. Input-output models also include static models such as tunable parameters or generalized matrices.

Output Arguments

B — Flag indicating whether model has finite coefficients

logical | logical array

Flag indicating whether model has finite coefficients, returned as a logical value or logical array.

Version History

Introduced in R2013a