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Select Data for Estimation

Select data subsets, specify estimation and validation data

Functions

fselect Select frequency points or range in FRD model
getexp Specific experiments from multiple-experiment data set
merge (iddata) Merge data sets into iddata object
fcat Concatenate FRD models along frequency dimension

Topics

Specify Estimation and Validation Data in the App

You should use different data sets to estimate and validate your model for best validation results.

Select Subsets of Data

Selecting portions of data for identification.

Create Data Sets from a Subset of Signal Channels

You can create a new data set in the System Identification app by extracting subsets of input and output channels from an existing data set.

Select Data Channels, I/O Data and Experiments in iddata Objects

Subreferencing data and its properties lets you select data values and assign new data and property values.

Select I/O Channels and Data in idfrd Objects

You can reference specific data values in the idfrd object using the following syntax:

Create Multiexperiment Data Sets in the App

You can create a time-domain or frequency-domain data set in the System Identification app that includes several experiments.

Create Multiexperiment Data at the Command Line

You can create iddata objects that contain several experiments.

Dealing with Multi-Experiment Data and Merging Models

This example shows how to deal with multiple experiments and merging models when working with System Identification Toolbox™ for estimating and refining models.

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