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MathGroup Archive 1998

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Re: How Mathematica do Interpolation?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg14843] Re: How Mathematica do Interpolation?
  • From: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Date: Fri, 20 Nov 1998 02:16:52 -0500
  • References: <72jdo7$3ab@smc.vnet.net> <72tptr$ikv@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

P.J. Hinton in message <72tptr$ikv at smc.vnet.net>...

gives  two ways for loading the package
Statistics`DescriptiveStatistics` when Mathematica starts


Snip[]

>Approach 1:
>
>1) Launch a Kernel and evaluate the following expression:
>
> ToFileName[{$PreferencesDirectory, "Kernel"}]
>
>This will print a path name that will be searched by the kernel as it
>is loading.  If there is an init.m file in this directory, it will be
>loaded and evaluated by the kernel just like a package.  While the path
>given by $PreferencesDirectory may exist on your system, it is unlikely
>that the Kernel directory does, so you'll need to create this manually.
>
>2) Open a text editor and type in the line:
>
>Needs["Statistics`DescriptiveStatistics"];
>
>Save this file as a plain text document in the Kernel directory that you
>created.  Give the file the name "init.m".  Close your text editor.
>
>
>Approach 2:
>
>1) Evaluate the following expression in a kernel:
>
> ToFileName[{$PreferencesDirectory, "AddOns", "Autoload"}]
>
>This will print a path name that will be searched by the kernel as it
>is loading.  If there is subdirectory with path
>
> <parent context name>|Kernel|
>
>and there is a file named init.m  in this directory, then the init.m
>file will be loaded as well.  These init.m files already reside in
>standard package directories, so you don't need to do any text editing.
>Whenever you invoke a function from your package, the package will be
>loaded without any need to invoke the loading command.
>
>2) The path $PreferencesDirectory returned by evaluating $Preferences
>directory probably already exists on your system, but you will need to
>create the path AddOns|Autoload yourself.
>
>3) Once you have created this directory, copy the the folder
>
>ToFileName[{$TopDirectory, "AddOns", "StandardPackages", "Statisitics",
>"Kernel"}]
>
>and its contents so that it sits in a directory with the name
>
>ToFileName[{$PreferencesDirectory, "AddOns, "Autoload", "Statistics"}]
>
>The next time you launch a kernel, the kernel will know to load the
>Statistics`DescriptiveStatistics` package whenever you invoke a
>function.
>

Paul

I find that we can avoid using the $PreferencesDirectory with Approach 2
by creating a folder "Statistics" in

ToFileName[{$TopDirectory, "AddOns, "Autoload"}]

and then copying the folder

ToFileName[{$TopDirectory, "AddOns", "StandardPackages",
"Statistics","Kernel"}]

to it.

Is one position to be prefered to the other?


Allan

---------------------
Allan Hayes
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565






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