MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Re: Viewing packages in mathematica

  • To: mathgroup at
  • Subject: [mg102754] Re: [mg102739] Re: Viewing packages in mathematica
  • From: John Fultz <jfultz at>
  • Date: Wed, 26 Aug 2009 07:43:12 -0400 (EDT)
  • Reply-to: jfultz at

On Mon, 24 Aug 2009 07:55:59 -0400 (EDT), David Park wrote:

> I wasn't aware that all those features are built into the front end
> package editor.
> But how do I find out information on using the .m file and editing it
> because when I search the Documentation Center I find practically nothing.
> If I copy a notebook package contents and paste into a new .m file it
> looks almost like the notebook. Except it has "Input" cells instead of
> "Code" cells. What is the difference between these cell types? I looked
> up Code Cells in the DC but found nothing.

Code cells actually form the package code.  Input cells remain evaluatable
in the FE, but are commented out in the package so that they are not
evaluated by Get[].

The styles behind the scenes do this by setting (or not) the
InitializationCell option, so it's basically the same as working with
auto-generated packages in a regular notebook.

> You say the files from the package editor are interchangeable with
> Workbench. How so?

Package files are text files.  Since the package editor uses the text
format directly, rather than backing a source notebook file with a
generated package file like auto-generated packages do, this means that
you can edit those package files with anything.  The FE adds a small
amount of markup, but that markup is in clearly delineated comments
which often actually help to annotate the file when it's edited with
any other editor.  And if you manually remove or alter the markup,
the FE won't (or shouldn't, anyway) throw a conniption.

> I went to one of my Workbench projects, took one of
> the package files and opened with the System Editor and got the front end
> editor. Fine. But after I did that I no longer could properly open the
> PacletInfo.m file. It wouldn't even open after I tried to open with the
> PacletInfo Editor. My whole project is presently messed up! Or maybe all
> my projects are messed up and I don't know what is the best method to
> reconstruct them.
I can't say what happened here.  Your description is too vague, and I
don't really know anything about the PacletInfo Editor.  But if you want
to send me your files and describe to me in more detail exactly what it
was you did, I'll certainly take a look at it.

John Fultz
jfultz at
User Interface Group
Wolfram Research, Inc.

> So that is what happens with Mathematica. One wants to work on math, or
> on some technical project, but one is always sucked down into a morass of
> undocumented features, and computer science, and guessing. One spends 95%
> of one's time working on Mathematica problems and 5% actually doing
> something interesting!
> David Park
> djmpark at
> From: John Fultz [mailto:jfultz at]
> I should make it clear that none of your reasons apply to the package
> editor
> in
> the Mathematica front end (available by opening a package file or through
> the
> menu item File->New->Package).  You can edit packages directly using that
> editor
> with all of the formatting, syntax coloring, cell types and grouping on
> package
> files which are completely interchangeable with Workbench or any other
> text
> editor you might favor for working with package files.
> There are a couple of things that you don't get which you would get with
> regular
> notebooks.  As the original post points out, you don't get line-wrapping
> in
> Code
> cells.  This was a deliberate design decision on our part.  We wanted to
> create
> a package editor which would be completely interchangeable with Workbench
> and
> other systems.  Therefore, two of the design goals were to limit the
> automatic
> formatting changes introduced by the front end when displaying/editing a
> package
> file, and to minimize the markup introduced into the package file by the
> front
> end when encoding cell group structure, cell styles, etc.
> I personally think we've struck a pretty good balance, although there are
> a
> few
> suggestions for features which remain to be implemented.  Others on this
> forum
> (and perhaps even within Wolfram) may disagree, and that's fine.  There
> are
> many
> options for editing package files.  Some people are very happy with
> Workbench,
> some with their own text editors, some with the FE's package editor, and
> some
> with notebooks auto-saved as packages.  All will continue to be supported
> for as
> far in the future as I can predict.
> Sincerely,
> John Fultz
> jfultz at
> User Interface Group
> Wolfram Research, Inc.
> On Sun, 23 Aug 2009 05:32:59 -0400 (EDT), David Park wrote:
>> I agree with you that I would much prefer to have Mathematica notebooks
>> as
>> the primary source for package code. The reasons are:
>> 1) You get the automatic formatting.
>> 2) You get syntax coloring.
>> 3) You can include Text cells for notes on the code.
>> 4) You can use sectional grouping so you don't have just one long
>> scroll.
>> 5) You're not completely committed to Workbench.
>> One of the major problem with creating .m files in Workbench is that if
>> you Import the code from a regular existing package then the .m code
>> does
>> not line wrap. This makes it very difficult to read and to modify.
>> However, if you copy and paste code from an existing notebook then it
>> does line wrap.
>> Making .m files the primary source of package definitions is a
>> significant
>> obstacle to users who would prefer to stay closer to mathematics than to
>> computer programming.
>> It would be nice if Workbench included a mechanism similar to the auto
>> generated package mechanism that would generate line wrapping .m files.
>> But there is a method that I've found, just in the last two days, that
>> works and is fairly convenient.
>> 1) In your Workbench application folder create package.nb and package.m
>> files.
>> 2) The package.nb notebook will look just like a regular package
>> notebook
>> done outside of Workbench except: don't make it an auto generated
>> package
>> and don't even use Initialization cells. (Making it an auto generated
>> package will get Workbench all confused!) This will be your primary
>> package
>> source file.
>> 3) To create the package.m file: Select all the Input cells in
>> package.nb, and copy them; go to the package.m file select everything
>> and
>> paste. (To select all the Input cells in package.nb hold down Alt and
>> click on one of the brackets.) With this method the code will line wrap
>> in the .m file. You can also just copy and paste a single routine. This
>> 'hand' method is quite quick and easy. You don't have to much look at
>> the
>> .m file.
>> I believe that once the kinks are smoothed out, and there is better
>> documentation and examples Workbench can be a very useful working
>> interface for regular Mathematica users. One advantage is that it is a
>> regular WRI supported feature of the Mathematica system, and it blends
>> with the rest of Mathematica. As I've mentioned before, some of the
>> things it could be used for are:
>> 1) Writing an electronic book.
>> 2) Writing university courseware.
>> 3) Working on a major research project.
>> 4) Self-study of a textbook or some subject matter.
>> All of these things are likely to generate routines that could be put
>> into a package, and if you are going to do that it might as well be
>> documented. It's not that much work if you confine it to major useful
>> routines. Then a Mathematica Application is a good way to organized
>> relatively finished material, package routines and subject matter
>> notebooks, so it is easy to get at it again. It's a lot better than
>> having a lot of loose notebooks with an undocumented routine here and
>> another there. It's a major fruit of your labor so it's worthwhile to
>> have it documented and organized.
>> David Park
>> djmpark at
>> From: Bill Rowe [mailto:readnews at]
>> Also, there is Wolfram Workbench. Others have found this useful.
>> As for myself, I've not found Wolfram Workbench to be that
>> useful. I much prefer keeping a Mathematica notebook and
>> generating the .m file from it.

  • Prev by Date: Re: Re: Recognizing finite groups in Mathematica 7
  • Next by Date: Contour plots with map style (rotated) labels
  • Previous by thread: Re: Viewing packages in mathematica
  • Next by thread: Re: Viewing packages in mathematica