How do I search my workspace variables?

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alex george 2018-1-17

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评论： Greg 2018-1-18

I have a large number of workspace variables. How can I search them for the ones I need? E.g. find my text "startingSpeed"

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James Tursa 2018-1-17

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What do you mean? Find the text "startingSpeed" inside of the string or char variables that you have in the workspace? Or find variables with that text in their name? Or ...?

alex george 2018-1-17

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编辑：alex george 2018-1-17

There's hundreds of variables in the righthand side where the workspace resides. How do I find the workspace variable with a name such as startingSpeed other than manually scrolling through to find it.

Stephen23 2018-1-17

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"I have a large number of workspace variables. How can I search them..."

These are not indicators of good code. Some beginners force themselves into writing slow, complex, buggy code by filling the workspace with variables and trying to magically access them.

You would be much better off avoiding such slow and obfuscated way of accessing data, and especially any that rely on runtime introspection such as searching the entire workspace.

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

alex george 2018-1-17

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编辑：alex george 2018-1-17

The variables are the result of running an extremely large Simulink program. I did not write that code. Is there no way to search for a matching variable in the workspace? These "variables" contain structures and arrays for the most part.

Stephen23 2018-1-17

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We just warned you against doing it because it is slow (and unavoidably leads to other problems): "Avoid functions that query the state of MATLAB such as inputname, which, whos, exist(var), and dbstack. Run-time introspection is computationally expensive."

https://www.mathworks.com/help/matlab/matlab_prog/techniques-for-improving-performance.html

Sadly the designers of Simulink did not follow good MATLAB practice, but yes there are ways:

You need to look at who, whos, and exist.