Test if toolbox is installed

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Cory Shutz
Cory Shutz 2015-6-5
回答： Walter Roberson 2022-2-2
I need to test if the program user has the "Statistics and Machine Learning Toolbox" installed. I'm use to testing licenses using: license('test', 'Simulink') as an example. When I use license('test', 'Statistics_and_Machine_Learning_Toolbox'), however, I receive the following error:
Error using license Feature name must be less than 28 characters.
Error is pretty straightforward, but I'm wondering if anyone has a workaround or another way to test for toolbox installation?
Thanks

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采纳的回答

Sean de Wolski
Sean de Wolski 2015-6-5
编辑：Sean de Wolski 2018-7-26
The license name is usually one or two words , so for stats, it will still be Statistics_Toolbox
license('test','statistics_toolbox')
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Chad Greene
Chad Greene 2019-2-15
Yeah, where is the complete list of features we can test for with the license function? There's only a partial list in the docs, so we're left shooting in the dark for things like the 'mapping_toolbox' .
Making matters worse, if you get the name wrong, the license function will implicitly tell you that there is a toolbox by that incorrect name, but you just don't have that toolbox. For example, I have the Mapping Toolbox, yet if I type this:
license('test','mapping_toolbox')
ans =
0
I'm left to believe I don't have the Mapping Toolbox. Implementing a check of all possible toolbox names might be logistically difficult, but providing a current list of all possible license names in the documentation would be very easy.
Walter Roberson
Walter Roberson 2019-2-15
Chad, see my table at
https://www.mathworks.com/matlabcentral/answers/377731-how-do-features-from-license-correspond-to-names-from-ver#answer_300675
I updated it today.
I do not have information on all of the toolboxes, and there are a few where I am not certain on the ver() code as I do not have them installed to test with.

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更多回答（3 个）

Christian Odenthal
Christian Odenthal 2020-12-3
编辑：Christian Odenthal 2020-12-3
Had the same problem and came to this solution:
contains(struct2array(ver), 'Statistics and Machine Learning Toolbox')
and for older matlab versions this works as well:
any(any(contains(struct2cell(ver), 'Statistics and Machine Learning Toolbox')))
Demis John
Demis John 2018-7-26
Hello, The answer here only gives us a command for finding out if a license is in use - not if the package is installed.
You actually need to check both the license AND installation, to catch such errors. It turns out that you can check for a license, get a "True" answer, but your program will still fail because the Toolbox isn't actually installed!
How can you _ programatically_ check if the toolbox is installed?
  2 个评论
Chad Greene
Chad Greene 2019-2-15
Using ver still is not a programmatic solution. See, entering the full name doesn't work:
>> ver('Statistics and Machine Learning Toolbox')
-----------------------------------------------------------------------------------------------------
MATLAB Version: #####
MATLAB License Number: #########
Operating System: #######
-----------------------------------------------------------------------------------------------------
Warning: No properly formatted Contents.m file was found for 'Statistics and Machine Learning Toolbox'.
> In ver (line 58)
...and entering the short name doesn't do anything either:
>> ver('image_toolbox')
-----------------------------------------------------------------------------------------------------
MATLAB Version: #####
MATLAB License Number: #########
Operating System: #######
-----------------------------------------------------------------------------------------------------
Warning: No properly formatted Contents.m file was found for 'image_toolbox'.
> In ver (line 58)

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Walter Roberson
Walter Roberson 2022-2-2
See the interesting code by @Julian Hapke at https://www.mathworks.com/matlabcentral/answers/377731-how-do-features-from-license-correspond-to-names-from-ver#answer_430148 which uses MATLAB code to find the names, and so should be independent of installation directories.

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