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

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Paul 2011-1-26

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https://ww2.mathworks.cn/matlabcentral/answers/427-can-the-value-of-a-parameter-in-a-model-workspace-be-determined-programatically-and-not-dirty-the-mo

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.

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Doug Eastman 2012-4-3

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 2012-5-15

Thanks!

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采纳的回答

Doug Eastman 2011-1-28

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/427-can-the-value-of-a-parameter-in-a-model-workspace-be-determined-programatically-and-not-dirty-the-mo#answer_817

在 MATLAB Online 中打开

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')

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Doug Eastman 2011-2-1

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 2011-2-1

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.

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