How to set up the path for a tree class download from internet?

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JFz
JFz 2017-8-11
评论： JFz 2017-8-14
Hi,
I downloaded a tree class from the web and put it under Matlab's main path. It works. But when I tried to make it into a package, say, +tree\@tree, It issues errors. So I typed import trees.*, and I can run some of it, but its source code does not know the path or the import trees.*.
Do I have to modify the source code to make it work under a package? I have been trying not to change the source code.
Thanks for any help.
Jennifer
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Jayaram Theegala
Jayaram Theegala 2017-8-14
What is the error that you are getting when you place the "tree" class inside a package? Also, when you are importing the package, you mentioned you can run some of it. What functions are you still not able to run and where is that function file located?

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回答（1 个）

Guillaume
Guillaume 2017-8-14
编辑：Guillaume 2017-8-14
Packages in matlab do not work like namespaces in any other language I know. In particular, functions and classes within a package are not automatically visible to other functions and classes in the same packages. They still have to be referred to by their full package name (or you have to import the package in each function that need other functions/classes).
It's a real pain, particularly if later on, you change the name of the package.
In brief, you can't just put a bunch of files under a +directory and expect it to work.
Personally, I've given up on packages, they've actually caused me more pain than they've solved.
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JFz
JFz 2017-8-14
Thanks for sharing. It is indeed a pain to me, since I tried hard not to change anything in the class. for now, I just put the tree class under the default location, works for now but not elegant.

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