User`s guide
12 Using the System Identification Tool GUI
Note Toviewtheentiredatarange,selectOptions > A utorange in the
plot window.
Selecting Measured and Noise Channels in Plots
Model inputs and outputs are called channels. When you create a plot of
a multivariable input-output data set or m odel, the plot only shows one
input-output channel pair at a time. The selected channel names are
displayed in the title bar of the plot window.
Note When you select to plot multiple data sets, and each data set contains
several input and output channels, the Channel menu lists channel pairs
from all data sets.
You can select a different input-output channel pair from the Channel menu
in any System Identification Toolbox plot window .
The Chan nel menu uses the following notation for channels:
u1->y2 means
that the plot displays a transfer function from input channel
u1 to out put
channel
y2.SystemIdentification Toolbox estimates as many noise sources as
there are output channels. In general,
e@ynam indicates that the noise source
corresponds to the output w ith name
ynam.
For example,
e@y3->y1 means that the transfer function from the noise
channel (associated with
y3) to outp ut cha nnel y2 is displayed. For more
information about noise channels, see “Subreferencing Measured and Noise
Models” on page 3-120.
Tip Wh en you import data into the System Identification Tool GUI, it is
helpful to assign meani ngful chan nel name s in the Import Data dialog box.
For more info rmation about importing data, see “Re presenting Data in the
GUI” on page 1-13.
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