User`s guide

8 Model Analysis
Residual Analysis Plot Settings
Action
Command
Display confidence
intervals around zero.
Note Confidence internal
are not available for
nonlinear ARX and
Hammerstein-Wiener
models.
• To display the dashed li nes on either
side of the nominal model curve, select
Options > Show confidence intervals.
Select this option again to hide the
confidence intervals.
• To change the confidence value, select
Options > Set % confidence level and
choose a value from the list.
• To enter your own confidence level, select
Options > Set confidence level > Other.
Enter the value as a probability (between
0 and 1) or as the number of standard
deviations of a Ga ussian d istribution .
Change the number of lags
(data samples) for which
to compute autocorellation
and cross-correlation
functions.
Note For
frequency-domain
validation data, increasing
the number of lags
increases the frequency
resolution of the residual
spectrum and the transfer
function.
• Select Options > Number of lags and
choosethevaluefromthelist.
• To enter your own lag value, select
Options > Set confidence level > Other.
Enter the value as the number of data
samples.
(Multiple-output system
only)
Select a different
input-output pair.
Select the input-output by name in the
Channel menu.
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