System Identification Toolbox

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The input is not sufficiently exciting for the chosen model order. Nonlinearity test results may be unreliable.

Last post by fyousefi « Mon Mar 01, 2021 8:10 pm

by fyousefi » Mon Mar 01, 2021 8:10 pm

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900 Views

Last post by fyousefi
Mon Mar 01, 2021 8:10 pm
The dataset is not long enough to build a nonlinear estimator. Nonlinearity test results may be unreliable.

Last post by fyousefi « Mon Mar 01, 2021 8:09 pm

by fyousefi » Mon Mar 01, 2021 8:09 pm

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712 Views

Last post by fyousefi
Mon Mar 01, 2021 8:09 pm
In the "treepartition/nltest" method, regressor matrix is required to complete the nonlinearity test for an uninitialize

Last post by fyousefi « Mon Mar 01, 2021 8:09 pm

by fyousefi » Mon Mar 01, 2021 8:09 pm

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713 Views

Last post by fyousefi
Mon Mar 01, 2021 8:09 pm
The value of the Measure character vector in the "aic(SYS,..., Measure)" command must be one of: ''nAIC'', ''AIC'', ''AI

Last post by fyousefi « Mon Mar 01, 2021 8:08 pm

by fyousefi » Mon Mar 01, 2021 8:08 pm

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750 Views

Last post by fyousefi
Mon Mar 01, 2021 8:08 pm
Only identified models can be used as inputs to the command.

Last post by fyousefi « Mon Mar 01, 2021 8:08 pm

by fyousefi » Mon Mar 01, 2021 8:08 pm

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688 Views

Last post by fyousefi
Mon Mar 01, 2021 8:08 pm
In the "lintan(NLMODEL, U, Y)" command, Y must be a vector of dimension equal to the number of model outputs.

Last post by fyousefi « Mon Mar 01, 2021 8:07 pm

by fyousefi » Mon Mar 01, 2021 8:07 pm

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703 Views

Last post by fyousefi
Mon Mar 01, 2021 8:07 pm
In the command, U must be a vector of dimension equal to the number of model inputs.

Last post by fyousefi « Mon Mar 01, 2021 8:06 pm

by fyousefi » Mon Mar 01, 2021 8:06 pm

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744 Views

Last post by fyousefi
Mon Mar 01, 2021 8:06 pm
The "lintan" command does not support models with nonlinearity estimator .Use the command instead.

Last post by fyousefi « Mon Mar 01, 2021 8:05 pm

by fyousefi » Mon Mar 01, 2021 8:05 pm

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773 Views

Last post by fyousefi
Mon Mar 01, 2021 8:05 pm
The "ivstruc" command cannot be used with multi-output data.

Last post by fyousefi « Mon Mar 01, 2021 8:04 pm

by fyousefi » Mon Mar 01, 2021 8:04 pm

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770 Views

Last post by fyousefi
Mon Mar 01, 2021 8:04 pm
Incorrect calling syntax for command "isnlarx". Type "help isnlarx" for more information.

Last post by fyousefi « Mon Mar 01, 2021 8:03 pm

by fyousefi » Mon Mar 01, 2021 8:03 pm

0 Replies

699 Views

Last post by fyousefi
Mon Mar 01, 2021 8:03 pm
The first input argument of the "isnlarx" command must be an IDDATA obj

Last post by fyousefi « Mon Mar 01, 2021 8:03 pm

by fyousefi » Mon Mar 01, 2021 8:03 pm

0 Replies

789 Views

Last post by fyousefi
Mon Mar 01, 2021 8:03 pm
The "isnlarx" command cannot be used with complex data.

Last post by fyousefi « Mon Mar 01, 2021 8:02 pm

by fyousefi » Mon Mar 01, 2021 8:02 pm

0 Replies

690 Views

Last post by fyousefi
Mon Mar 01, 2021 8:02 pm
The second input argument of the "findop" command must be an OPERSPEC object or a character vector. Type "help or "

Last post by fyousefi « Mon Mar 01, 2021 8:02 pm

by fyousefi » Mon Mar 01, 2021 8:02 pm

0 Replies

869 Views

Last post by fyousefi
Mon Mar 01, 2021 8:02 pm
Data dimension is inconsistent with nonlinearity estimator.

Last post by fyousefi « Mon Mar 01, 2021 8:00 pm

by fyousefi » Mon Mar 01, 2021 8:00 pm

0 Replies

697 Views

Last post by fyousefi
Mon Mar 01, 2021 8:00 pm
Incorrect specification of initial states for the command. Type "help for more information.

Last post by fyousefi « Mon Mar 01, 2021 8:00 pm

by fyousefi » Mon Mar 01, 2021 8:00 pm

0 Replies

717 Views

Last post by fyousefi
Mon Mar 01, 2021 8:00 pm
The "Input" property of the IDNLHWOPSPEC object must have the following fields: ''Value'', ''Min'', ''Max'', ''Known''.

Last post by fyousefi « Mon Mar 01, 2021 7:58 pm

by fyousefi » Mon Mar 01, 2021 7:58 pm

0 Replies

754 Views

Last post by fyousefi
Mon Mar 01, 2021 7:58 pm
The specified initial state values represent { number,integer} data experiments, while the data has ,number,integer

Last post by fyousefi « Mon Mar 01, 2021 7:58 pm

by fyousefi » Mon Mar 01, 2021 7:58 pm

0 Replies

746 Views

Last post by fyousefi
Mon Mar 01, 2021 7:58 pm
The size of specified initial states ({ number,integer}) does not match the number of states of the model ({ number,in

Last post by fyousefi « Mon Mar 01, 2021 7:56 pm

by fyousefi » Mon Mar 01, 2021 7:56 pm

0 Replies

765 Views

Last post by fyousefi
Mon Mar 01, 2021 7:56 pm
The specified initial state value for state no. number,integer violates its existing minimum bound in the model.

Last post by fyousefi « Mon Mar 01, 2021 7:55 pm

by fyousefi » Mon Mar 01, 2021 7:55 pm

0 Replies

731 Views

Last post by fyousefi
Mon Mar 01, 2021 7:55 pm
Model simulation could not be completed. Check the model's ODE file and its parameters.

Last post by fyousefi « Mon Mar 01, 2021 7:52 pm

by fyousefi » Mon Mar 01, 2021 7:52 pm

0 Replies

764 Views

Last post by fyousefi
Mon Mar 01, 2021 7:52 pm
The number of experiments in the initial condition data must match those in simulation input data.

Last post by fyousefi « Mon Mar 01, 2021 7:38 pm

by fyousefi » Mon Mar 01, 2021 7:38 pm

0 Replies

693 Views

Last post by fyousefi
Mon Mar 01, 2021 7:38 pm
The number of experiments in the initial condition data must match those in simulation input data.

Last post by fyousefi « Mon Mar 01, 2021 7:38 pm

by fyousefi » Mon Mar 01, 2021 7:38 pm

0 Replies

648 Views

Last post by fyousefi
Mon Mar 01, 2021 7:38 pm
In the "predict(SYS, DATA, K, INIT)" command, the number of experiments in INIT must match those in DATA.

Last post by fyousefi « Mon Mar 01, 2021 5:48 pm

by fyousefi » Mon Mar 01, 2021 5:48 pm

0 Replies

724 Views

Last post by fyousefi
Mon Mar 01, 2021 5:48 pm
The "Input" property of the IDNLARXOPSPEC object must have the following fields: ''Value'', ''Min'', ''Max'', ''Known''.

Last post by fyousefi « Mon Mar 01, 2021 5:48 pm

by fyousefi » Mon Mar 01, 2021 5:48 pm

0 Replies

671 Views

Last post by fyousefi
Mon Mar 01, 2021 5:48 pm
The ''matching'' option in the command must be followed by an IDDATA object.

Last post by fyousefi « Mon Mar 01, 2021 5:47 pm

by fyousefi » Mon Mar 01, 2021 5:47 pm

0 Replies

713 Views

Last post by fyousefi
Mon Mar 01, 2021 5:47 pm

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