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MathGroup Archive 2006

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Re: Package writing

  • To: mathgroup at smc.vnet.net
  • Subject: [mg67233] Re: Package writing
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Wed, 14 Jun 2006 06:28:34 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <e6lhqr$nfs$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

only one question .. *you* *changed* the *name* ??
You package define a context and this context it 
translated into
a directory/filename, i.e.
something like

BeginPackage["This`Is`My`Package`"]
EndPackage[]

is searched as  (somewhere 
$Path)/This/Is/My/Package.m
There is a function ContextToFileName[] that does 
the
translation. If you load a package that is found 
but it
does not create the correct context you should get
atleast a warning. So you can't
"I chnaged the name of that file to DD.m"

So
a) What it the file name of the notebook ?
b) What is the context of the package ?

Regards
  Jens


"marek" <MarekBr at gmail.com> schrieb im Newsbeitrag 
news:e6lhqr$nfs$1 at smc.vnet.net...
| Hello All
| I have the following problem. I used Template.nb 
to create a package.
| During the whole process I had some problems 
trying to get it to work
| although the same commands in a different 
(fresh/new notebook) produced
| desired results. Right now the sutuation is as 
follows. I can use my
| poackage if I load it into any notebook but it 
does not work in the
| original notebook I used to write it. I have 
that notebook and the
| associated m file in 
/home/marek/Mathematica/Packages. Here are first 4
| command I execute in the original notebook
| 1. 
SetDirectory["/home/marek/Mathematica/Packages"]
| This sets my working directory to the directory 
in which my package is
| located.
| 2. AppendTo[$Path, 
"/home/marek/Mathematica/Packages"];
| Here I append this very same directory to my 
search path so that I can
| load that package in the same notebook for 
testing purposes.
| 3. Needs["DataAnalysis`"]
| This line loads that package. When I execute 
that line I get no
| complaints form Mathematica that it cannot open 
something or anything
| like that
| After those there is a bunch of cells with the 
implementation of my
| ppackage all of which are set to be an 
Initialization cells.
| After them I have few cells which are using 
functions from my package
| but they do not work. The symbols/functions 
defined in that package
| seems to be recognized because Ctrl=k 
combination does the
| autocomplition but nothing happens when I 
execute a cell with a funcion
| defined in my package.
| On the other hand I can copy my package to
| /home/marek/.Mathematica/AutoLoad directory (and 
I do it changing the
| name of that m file) and it works fine from 
there after I open new
| notebook and load it with Needs["DD`"] (I 
chnaged the name of that file
| to DD.m)
| In a fresh notebook I can execute that AppendTo 
command from above and
| then load my package from the original 
development directory (it has
| different name there so I know that it is that 
version which is being
| loaded not the one from 
/home/marek/.Mathematica/AutoLoad) and it will
| work fine.
| So why I cannot use my package from the original 
notebook I wrote it
| in?
| Any suggestiones greatly appreciated
| Marek
| 



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