How to extract all variable names returned by Simulink.findVars?

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K E 2012-4-30

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采纳的回答： Geoff

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I want to list all variables in my Simulink model, which I have collected via:

allVars = Simulink.findVars(bdroot)

It is easy to retrieve a single variable's name, for example:

allVars(2).Name

But listing them using allVars.Name puts many spaces between each name, so it's hard to see them together. How do I display all the variable names without spaces using a 1-line command? Or do I have to loop through each? Does Simulink.WorkspaceVar correspond to a more familiar data type like a cell array?

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K E 2012-4-30

This loop does what I want, but is there a 1-line version?

for iName = 1:length(allVars)

disp(allVars(iName).Name)

end

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Answer 1

Geoff 2012-4-30

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Do you mean you have tried:

disp(char(allVars(:).Name));

That would pad each name with spaces due to conversion to a char matrix.

If you want a one-liner, you can do a poor-man's loop:

cellfun(@disp, cellstr(char(allVars(:).Name)));

Or indeed:

arrayfun(@(n) disp(allVars(n).Name), 1:length(allVars));

But I don't really see either of these as an advantage in terms of clarity. The benefit is you can wrap it into a lambda function when you want to do it often:

dispvars = @(v) cellfun(@disp, cellstr(char(v(:).Name)));
dispvars(allVars);

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K E 2012-5-1

Thanks, Geoff. This worked perfectly:

disp(char(allVars.Name))

It was also useful to learn about cellfun, arrayfun, and anonymous functions from your other solutions. I don't use these, but now I will.

Just wondering: Does Simulink.WorkspaceVar correspond to a more familiar Matlab item, like a cell array? If so, I would be able to make better use of it.

Geoff 2012-5-1

Sorry, I can't answer that question - I don't have simulink! =) But if you want to know what it is, do this: class(Simulink.WorkspaceVar)

Glad the first thing worked for you. I thought you wanted them displayed without the trailing spaces, hence the trickier options that do the same thing as your loop example.

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