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Re: Quit versus Clear["Global`*"]

• To: mathgroup at smc.vnet.net
• Subject: [mg121216] Re: Quit versus Clear["Global`*"]
• From: Murray Eisenberg <murray at math.umass.edu>
• Date: Sun, 4 Sep 2011 18:05:26 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201109031205.IAA05310@smc.vnet.net> <j3u7r6$a88$1@smc.vnet.net> <201109040812.EAA14914@smc.vnet.net>
• Reply-to: murray at math.umass.edu

Try the following little three-part experiment.  In each part, the last 
step tells you what Mathematica now knows about the symbol f.

    f[x_] := Plot[x, {x, 0, 1}]
    SetAttributes[f, Listable]
    Clear[f]
    ??f

    f[x_] := Plot[x, {x, 0, 1}]
    SetAttributes[f, Listable]
    ClearAll[f]
    ??f

    f[x_] := Plot[x, {x, 0, 1}]
    SetAttributes[f, Listable]
    Remove[f]
    ??f

On 9/4/11 4:12 AM, AES wrote:
> In article<j3u7r6$a88$1 at smc.vnet.net>,
>   Murray Eisenberg<murray at math.umass.edu>  wrote:
>
>> First, Clear, whether for a single object or an entire list of objects,
>> does not remove their Attributes, e.g., just their values. You might
>> want ClearAll instead.
>
> And how do either of those differ from Remove?
>

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305

• References:
  • Quit versus Clear["Global`*"]
    • From: Themis Matsoukas <tmatsoukas@me.com>
  • Re: Quit versus Clear["Global`*"]
    • From: AES <siegman@stanford.edu>