Can the value of a parameter in a model workspace be determined programatically and not dirty the model workspace?

The only way I know of to determine the value of a parameter in the model workspace is like this:

hws = get_param('mymodel','modelworkspace'); p = hws.evalin('param');

Howevever, the call to evalin makes the model workspace dirty. Is there a way to get the value of param and keep the model workspace clean? It would be nice if there was:

p = hws.read('param');

which would have no effect on the cleanliness of the model workspace.

[K E]

Can you please define 'dirty' and 'clean' as they apply to a workspace?

[Doug Eastman]

Dirty means that MATLAB thinks the file has changed since it was last saved on disk and is indicated by an * next to the name in the title bar. This results in for example a dialog box popping up when the model/file is closed asking if you want to save changes.

In this context the model workspace being dirty means that the model itself is dirty.

[K E]

Thanks!

Answer 1

[Doug Eastman]

Here is one way that does not dirty the model:

hws = get_param('mymodel','modelworkspace');
myData = hws.data;
p = myData(strcmp({myData.Name},'param')).Value;
clear('myData')

[Paul]

I just recently discovered hws.data (and hws.isDirty and other hws methods). However, I don't think it's documented. How did you find it?

[Doug Eastman]

I thought I did see it in the doc, but now I can't find it so maybe not. I'm pretty sure I first saw this by hitting tab after typing 'hws.' to see a list of all the properties and methods, something I generally do when playing with new objects.

[Paul]

I found it using the tab approach also. Should I be worried about using an undocumented method? I wonder why it and others are not documented. hws.data and hws.isDirty are very useful.