User`s guide

Creating Multiexperiment Data at the Command Line ... 1-53
Subreferencing iddata Objects
....................... 1-55
Modifying Time and Frequency Vectors
............... 1-59
Naming, Adding, and R emov ing Data Channels
......... 1-63
Concatenating iddata Objects
....................... 1-65
Representing Frequency-Response Data Using idfrd
Objects
......................................... 1-67
idfrd Constructor
.................................. 1-67
idfrd Properties
................................... 1-68
Subreferencing idfrd Objects
........................ 1-70
Concatenating idfrd O bjects
......................... 1-71
See Also
......................................... 1-74
Analyzing Data Quality Using P lots
................. 1-75
Supported Data Plots
.............................. 1-75
Plotting Data in the System Identication Tool GUI
..... 1-75
Plotting Data at the Command Line
.................. 1-81
Getting Advice About Your Data
.................... 1-84
Selecting Subsets of Data
........................... 1-86
Why Select Subsets of Data?
........................ 1-86
Selecting Data Using the GUI
....................... 1-87
Selecting Data at the Command Line
................. 1-89
Handling Missing Data and Outliers
................. 1-90
Handling Missing Data
............................. 1-90
Handling Outliers
................................. 1-91
Example Extracting and Modeling SpecicData
Segments
...................................... 1-92
See Also
......................................... 1-93
Subtractin g Trends from Signals (Detrending)
....... 1-94
What Is Detrending?
............................... 1-94
When to Detrend Data
............................. 1-94
When N ot to Detrend Data
.......................... 1-95
GUI and Command-Line Alternatives for Detrending
Data
.......................................... 1-96
How to Detrend Data Using the GUI
.................. 1-96
How to Detrend Data at the Command Line
............ 1-97
viii Contents