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It is recommended to run model validation tests (RESID, COMPARE commands) using a dataset different from the one used fo

Last post by fyousefi « Tue Mar 02, 2021 7:01 am

by fyousefi » Tue Mar 02, 2021 7:01 am

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Last post by fyousefi
Tue Mar 02, 2021 7:01 am
There is a very strong indication that the dynamics of the model is not adequately described.

Last post by fyousefi « Tue Mar 02, 2021 7:00 am

by fyousefi » Tue Mar 02, 2021 7:00 am

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Last post by fyousefi
Tue Mar 02, 2021 7:00 am
There is a strong indication that the dynamics of the model is not adequately described.

Last post by fyousefi « Tue Mar 02, 2021 7:00 am

by fyousefi » Tue Mar 02, 2021 7:00 am

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539 Views

Last post by fyousefi
Tue Mar 02, 2021 7:00 am
There is an indication that the dynamics of the model is not adequately described.

Last post by fyousefi « Tue Mar 02, 2021 6:59 am

by fyousefi » Tue Mar 02, 2021 6:59 am

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Last post by fyousefi
Tue Mar 02, 2021 6:59 am
A first general advice is to run RESID(VDATA FR') to check in which frequency ranges the model error is present. If

Last post by fyousefi « Tue Mar 02, 2021 6:58 am

by fyousefi » Tue Mar 02, 2021 6:58 am

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Last post by fyousefi
Tue Mar 02, 2021 6:58 am
In particular you should pay attention to lags from input { number,integer}. Modify KU and the model order so that

Last post by fyousefi « Tue Mar 02, 2021 6:57 am

by fyousefi » Tue Mar 02, 2021 6:57 am

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Last post by fyousefi
Tue Mar 02, 2021 6:57 am
There is no indication that the noise model should be incorrect.

Last post by fyousefi « Tue Mar 02, 2021 6:55 am

by fyousefi » Tue Mar 02, 2021 6:55 am

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530 Views

Last post by fyousefi
Tue Mar 02, 2021 6:55 am
There is a very strong indication that the model errors are not white. Since you have not built a noise model, this is O

Last post by fyousefi « Tue Mar 02, 2021 6:55 am

by fyousefi » Tue Mar 02, 2021 6:55 am

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564 Views

Last post by fyousefi
Tue Mar 02, 2021 6:55 am
There is an indication that the model errors are not white. Since you have not built a noise model, this is OK. However

Last post by fyousefi « Tue Mar 02, 2021 6:53 am

by fyousefi » Tue Mar 02, 2021 6:53 am

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Last post by fyousefi
Tue Mar 02, 2021 6:53 am
There is a very strong indication that the residuals are not white. To get a good noise model you need to increase the o

Last post by fyousefi « Tue Mar 02, 2021 6:53 am

by fyousefi » Tue Mar 02, 2021 6:53 am

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530 Views

Last post by fyousefi
Tue Mar 02, 2021 6:53 am
There is a strong indication that the residuals are not white. To get a good noise model you need to increase the orders

Last post by fyousefi « Tue Mar 02, 2021 6:52 am

by fyousefi » Tue Mar 02, 2021 6:52 am

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Last post by fyousefi
Tue Mar 02, 2021 6:52 am
There is an indication that the residuals are not white. To get a good noise model you need to increase the orders assoc

Last post by fyousefi « Tue Mar 02, 2021 6:51 am

by fyousefi » Tue Mar 02, 2021 6:51 am

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507 Views

Last post by fyousefi
Tue Mar 02, 2021 6:51 am
The model order seems unnecessarily high. Try models of lower order and see if they are able to reproduce validation dat

Last post by fyousefi « Tue Mar 02, 2021 6:50 am

by fyousefi » Tue Mar 02, 2021 6:50 am

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Last post by fyousefi
Tue Mar 02, 2021 6:50 am
On the other hand, the accuracy of the estimate seems to be such that the high order dynamics is accurately estimated.

Last post by fyousefi « Tue Mar 02, 2021 6:49 am

by fyousefi » Tue Mar 02, 2021 6:49 am

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471 Views

Last post by fyousefi
Tue Mar 02, 2021 6:49 am
Using continuous-time initial condition object with discrete-time frequency-domain data can lead to inaccurate results.

Last post by fyousefi « Tue Mar 02, 2021 6:48 am

by fyousefi » Tue Mar 02, 2021 6:48 am

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496 Views

Last post by fyousefi
Tue Mar 02, 2021 6:48 am
In the "initialCondition(SYS)" command, SYS must be a numeric, or parametric LTI object, such as IDSS, IDTF, IDPOLY, TF,

Last post by fyousefi « Tue Mar 02, 2021 6:47 am

by fyousefi » Tue Mar 02, 2021 6:47 am

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Last post by fyousefi
Tue Mar 02, 2021 6:47 am
The initialCondition object cannot be created by converting from the object.

Last post by fyousefi « Tue Mar 02, 2021 6:47 am

by fyousefi » Tue Mar 02, 2021 6:47 am

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500 Views

Last post by fyousefi
Tue Mar 02, 2021 6:47 am
Model arrays cannot be used to create initialCondition object.

Last post by fyousefi « Tue Mar 02, 2021 6:46 am

by fyousefi » Tue Mar 02, 2021 6:46 am

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495 Views

Last post by fyousefi
Tue Mar 02, 2021 6:46 am
Continuous-time models containing feedthrough cannot be used to create an initialCondition object.

Last post by fyousefi « Tue Mar 02, 2021 6:45 am

by fyousefi » Tue Mar 02, 2021 6:45 am

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Last post by fyousefi
Tue Mar 02, 2021 6:45 am
When initialCondition.X0 contains greater than 1 columns, the system SYS = idss(initialCondition) must be expressible as

Last post by fyousefi « Tue Mar 02, 2021 6:45 am

by fyousefi » Tue Mar 02, 2021 6:45 am

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550 Views

Last post by fyousefi
Tue Mar 02, 2021 6:45 am
When comparing the response of a discrete-time model, the sample time of the model must match that of validation data

Last post by fyousefi « Tue Mar 02, 2021 6:34 am

by fyousefi » Tue Mar 02, 2021 6:34 am

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504 Views

Last post by fyousefi
Tue Mar 02, 2021 6:34 am
The initial states and model predictors will be computed separately for each output because the model contains irreducib

Last post by fyousefi « Mon Mar 01, 2021 8:48 pm

by fyousefi » Mon Mar 01, 2021 8:48 pm

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495 Views

Last post by fyousefi
Mon Mar 01, 2021 8:48 pm
Response values containing non-finite values were ignored for the computation of goodness of fit measures.

Last post by fyousefi « Mon Mar 01, 2021 8:47 pm

by fyousefi » Mon Mar 01, 2021 8:47 pm

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Last post by fyousefi
Mon Mar 01, 2021 8:47 pm
The output values for time instants less than those corresponding to the provided input signal will not be computed and

Last post by fyousefi « Mon Mar 01, 2021 8:47 pm

by fyousefi » Mon Mar 01, 2021 8:47 pm

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491 Views

Last post by fyousefi
Mon Mar 01, 2021 8:47 pm
Provide a dataset for predicting or simulating model response.

Last post by fyousefi « Mon Mar 01, 2021 8:46 pm

by fyousefi » Mon Mar 01, 2021 8:46 pm

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400 Views

Last post by fyousefi
Mon Mar 01, 2021 8:46 pm

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