| System Identification Toolbox | |
Data Representation
In the System Identification Toolbox, signals and observed data are represented as column vectors, e.g.,
The entry in row number k, i.e., u(k), will then be the signal's value at sampling instant number k. It is generally assumed in the toolbox that data are sampled at equidistant sampling times, and the sampling interval T is supplied as a specific argument.
We generally denote the input to a system by the letter u and the output by y. If the system has several input channels, the input data is represented by a matrix, where the columns are the input signals in the different channels:
The same holds for systems with several output channels.
The observed input-output data record is represented in the System Identification Toolbox by the iddata object, that is created from the input and output signals by
The iddata object can also be created from the input and output signals when the data are inserted into the GUI.
| | Help Texts | Getting Input-Output Data into the GUI | |