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Re: Re: Displaying results in a column

  • To: mathgroup at smc.vnet.net
  • Subject: [mg104986] Re: [mg104958] Re: Displaying results in a column
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Sun, 15 Nov 2009 20:49:33 -0500 (EST)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <hdgr97$jeq$1@smc.vnet.net> <hdlk5v$he1$1@smc.vnet.net> <200911151054.FAA09161@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

Multiplying pretty much ANYTHING by ANYTHING is syntactically OK -- even 
if semantically meaningless.  This generality is one of the things that 
makes Mathematica such a powerful, yet unified system rather than jus a 
collection of disparate functionalities.

Try, for example, the following product of three objects:

Plot3D[Sin[x Sin[y]],{x,0,Pi},{y,0,Pi}] Grid[CityData["Amherst"]] 
Manipulate[Expand[(1+c)^n],{n,2,5}]

AES wrote:
> In article <hdlk5v$he1$1 at smc.vnet.net>,
>  David Bailey <dave at removedbailey.co.uk> wrote:
> 
>>> {expr1, "\n"expr2, "\n"expr3, "\n"expr4, . . . }
>>>
>>> seems to work just fine (in putting sequential expressions on sequential lines)
>>>
> 
>> Note that as written, you are actually multiplying the subsequent 
>> expressions by the string "\n"! If one of your expressions happens to 
>> evaluate to 1, you will get a surprise! You should use Column, as others 
>> have already pointed out.
> 
> Haven't tried your surprise yet -- but I was surprised to find that
> 
>     "\n"expr1a + expr1b    and   "\n"(expr1a+expr1b)
> 
> functioned differently -- and now I understand why.
> 
> Is multiplying a general expression by a string ("\n") actually legal 
> syntax? (and if not, should my using it have triggered an error 
> message?)
> 

-- 
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


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