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Re: Package problem

• To: mathgroup at smc.vnet.net
• Subject: [mg34826] Re: Package problem
• From: lamontgra at yahoo.com (Graham)
• Date: Sat, 8 Jun 2002 05:21:50 -0400 (EDT)
• References: <adf008$5r0$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

David
Thanks I think I'm getting there but I still not clear about some
things:

 > Graham,
> >
> > The package starts :
> > BeginPackage["Roulette`BallSim1`"]
> >
> 
> So far, so good. Now create a folder named Roulette in the
> AddOns\ExtraPackages folder. Put your package notebook there. Your package
> notebook should have the name BallSim1.nb. Make all of the statements in
> your notebook separate cells as far as possible. And make them
> Initialization cells. When you save your notebook choose to create an
> AutoSavePackage. 

How do I do this ?
Sometimes Mathematica asks " Do you want to create an AutoSavePackage ?"
But sometimes not. How can I force this ?

When I try Save->Special->Package:
It says its saving as *.m but then saves as *.nb and asks to overwrite
the notebook I'm using!

This will create the BallSim1.m package file and each time
> you modify the BallSim1.nb notebook and save it, the package file will also
> automatically be updated. You should never have to directly edit a .m file.
> 
> Now load the package with
> 
> Needs["Roulette`BalSim1`"]
> 
> Also, I'm believe the names are case sensitive. Notice that the leading
> context names are like directory paths. Mathematica automatically looks in
> StandardPackages and ExtraPackages so you only have to give the context path
> from that point down. That should work.
> 
> David Park
> djmp at earthlink.net
> http://home.earthlink.net/~djmp/
> 
> > From: Graham [mailto:lamontgra at yahoo.com]
To: mathgroup at smc.vnet.net
> >
> > I am trying to create a package and read it in.
> >
> > The package starts :
> > BeginPackage["Roulette`BallSim1`"]
> >
> > BallFall::usage = "Performs simulation of ball motion through fluid"
> >  (* BallFall
> >     a:: drag coefficient (a*v^2)
> >
> >
> > But I get this:
> >
> > Get["ballsim1`"]
> > Notebook[{Cell[
> >       BoxData[{RowBox[{RowBox[{"BeginPackage", "[",
> > "\"Roulette`BallSim1`\"",
> >                   "]"}], "\n"}], "\[IndentingNewLine]",
> >           RowBox[{RowBox[{"BallFall", "::", "usage"}], "=", " ",
> >               RowBox[{"\"Performs simulation of ball motion
> > through fluid\"",
> >                    "\[IndentingNewLine]", " "}],
> >               RowBox[{"(*", " ",
> >                   RowBox[{"BallFall", "\n",
> >                       RowBox[{RowBox[{"a", "::", " ", "drag"}], " ",
> >                           "coefficient",
> >
> >
> > Whtas happening ?
> > Is the file corrupt perhaps ?
> > Can you edit .m files in the notebook interface ?
> >
> > Thanks
> > Graham
> >