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Re: Scalars Instead of Lists with One Element

  • To: mathgroup at smc.vnet.net
  • Subject: [mg83510] Re: Scalars Instead of Lists with One Element
  • From: Szabolcs Horvát <szhorvat at gmail.com>
  • Date: Wed, 21 Nov 2007 06:00:51 -0500 (EST)
  • References: <200711200846.DAA07103@smc.vnet.net> <FFDD2258-D07B-4A08-9A25-2203E647669B@jeol.com> <fi0npe$5h4$1@smc.vnet.net>

Gregory Lypny wrote:
> Yes, I'm trying to reproduce the {.} problem with some regularity.   
> Be that as it may, it's not clear why, when I iterate over {i,  
> 1,...,8} and {j ,1,...,8}, I get tables with dimensions {8, 8, 1}  
> rather than {8, 8}.  That's the cut-and-paste problem.  Sigh.
> 

Gregory,

Table[i*j, {i, 8}, {j, 8}] returns a list with dimensions {8, 8}.  But 
if the expression inside Table returns a single-element list, then the 
table will have dimensions {8, 8, 1}.  Example: Table[{i*j}, {i, 8}, {j, 
8}].  So you could try using

Table[
   First[(complicated expression that returns a single element list)],
   {i, 8}, {j, 8}
]

Szabolcs


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