MATLAB: How to perform the programmatic equivalent action of dragging a validation data set to the Validation Data box in the System Identification GUI 7.3 (R2009a)

dataidentificationprogrammaticallysystemSystem Identification Toolboxvalidation

I would like to know what commands are being run when I drag and drop a validation dataset to the Validation Data box in the System Identification GUI.

Best Answer

The equivalent of dragging a validation dataset to the Validation Data box in the System Identification GUI is the command COMPARE as follows:

compare(data,m);

where data is the validation dataset, and m is your idmodel or idnlmodel.

Related Solutions

MATLAB: How to set a limit to the coefficient of the estimated transfer function in the System Identification app

The GUI for transfer function estimation does not support parameter constraints, but it's possible in command-line, without using grey-box modeling.

More details are at

https://www.mathworks.com/help/ident/ug/imposing-constraints-on-model-parameter-values.html

For example, given the data

u = randn(200,1);
y = randn(200,1);
ts = 0.1;
z = iddata(y,u,ts);
% Generate an initial model, perhaps by unconstrained initialization, prior knowledge, or random system. 
Gtf = tfest(z,2,0); % unconstrained initialization
Gtf.Structure.Numerator.Minimum = 0; % Constrain the numerator coefficient to be positive 
Gtf.Structure.Numerator.Value = 1e-4; % Give a + numerator guess
Gtf = tfest(z,Gtf); % Refine the initial model estimate

MATLAB: Is it that I cannot drag dataset to Working Data rectangle in the System Identification (SysID) GUI of R2013b in the MAC

This issue is reported for R2013b version of System Identification toolbox. The development team is aware of this and they have fixed the issue for R2014b.

Restarting of the machine may help but the reliability of this resolution may vary on the system. To workaround this issue, please see the following way of programmatically assigning a dataset to the working data rectangle:

1. Note down the target dataset name (say, 'data1'); this is the name that appears on the source data icon.

2. Fetch a handle to the text object showing this name:

t1=findall(0,'type','text','string','data1')

3. Fetch the handle to the parent axes:

ax1=ancestor(t1,'axes')

4. Fetch a handle to the destination axes ("working data" box)

ax2=findall(0,'type','axes','tag','seles')

5. Execute the drag-drop callback manually:

iduidrop(ax1,ax2);

You can carry out other drag/drop operations by finding handles to the source (ax1) and destination (ax2) axes and then calling IDUIDROP.

Best Answer

Related Solutions

MATLAB: How to set a limit to the coefficient of the estimated transfer function in the System Identification app

MATLAB: Is it that I cannot drag dataset to Working Data rectangle in the System Identification (SysID) GUI of R2013b in the MAC

Related Question