Re: How to make variable have package scope but not global scope.

*To*: mathgroup at smc.vnet.net*Subject*: [mg90416] Re: How to make variable have package scope but not global scope.*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Tue, 8 Jul 2008 07:49:44 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <g4v33p$ih2$1@smc.vnet.net>

jeremito wrote: > I am a beginner in package development in Mathematica. I need a > package because I have several functions that call each other that > depend on the same data. Instead copying and passing the data around, > I want to have the functions all access the data directly. > > My package currently looks like: > > f[A_, x_] := Module[{}, > b = A.x; > Return[{b,A}]; > ] It would be much better to write it as follows (local variables and no Return statement): f[A_, x_] := Module[{b}, (* b is now a local variable to the function f *) b = A.x; {b,A} (* Last expression is returned if it does not end by a semicolon *) ] (* b is not visible outside the scope of Module *) > g[A_, l_] := Module[{}, > .... > (*You get the picture*) > ] > > > So my question is, how can my variables have package scope, but not > global scope? What is the best way to implement this? Not sure what you mean by that. Are you talking about contexts? In this case, the following might help: http://reference.wolfram.com/mathematica/tutorial/Contexts.html http://reference.wolfram.com/mathematica/tutorial/ManipulatingSymbolsAndContextsByName.html Regards, -- Jean-Marc