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Set up a package with Needs[]?

Math Logic
Posted 10 years ago

By steps Insert/FilePath, I got a file path: "D:\Mathematica\Mathematica Programer II\MATHPROG\LOGICPROGRAMMING.M", but 

Needs["D:\\Mathematica\\Mathematica Programer \
II\\MATHPROG`LOGICPROGRAMMING.m`"]

Mathematica always says 

    Needs::cxt: Invalid context specified at position 1 in
 Needs[D:\Mathematica\Mathematica Programer II\MATHPROG`LOGICPROGRAMMING.m` ]. 
A context must consist of valid symbol names separated `

In fact I put `, What's wrong?
POSTED BY: Math Logic
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Math Logic
Math Logic
Posted 10 years ago

Got it !(See below run result.) In fact, all the packages and the files in the directory, hold CAPITAL LETTERS. However, inner the files.m , the self-names are stated in lower case like MathProg, LogicProgramming.m. Now I transformed all in lowercase, and run successfully. Thank you very much for your help ![enter image description here][1]

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POSTED BY: Math Logic

you need to add a prime at the end of the context name, and delete it from the file name:

Needs["MATHPROG`LOGICPROGRAMMING`", "D:\\Mathematica\\Mathematica \
Programer II\\MATHPROG`LOGICPROGRAMMING.m"]

Also, are you sure your context in the .m file is in all capital letters like that? -- make sure to match the case of the Begin[...] in the .m file.
POSTED BY: Neil Singer
Math Logic
Math Logic
Posted 10 years ago

enter image description hereThanks!enter image description here But still failed, running see result image.

Mathematica sometimes does run when code meet their syntax!

POSTED BY: Math Logic

The first argument of Needs is not the path, but the context. You can give the path as second argument. Something like this:

Needs["MATHPROG`LOGICPROGRAMMING", "D:\\Mathematica\\Mathematica \
Programer II\\MATHPROG`LOGICPROGRAMMING.m`"]

but you will probably have to retype the context and path. You can use Get with the path only.
POSTED BY: Gianluca Gorni
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