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Re: Re: pattern

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84400] Re: [mg84377] Re: pattern
  • From: Brett Champion <brettc at wolfram.com>
  • Date: Fri, 21 Dec 2007 03:23:58 -0500 (EST)
  • References: <3eb7b73d-e7dd-488e-abdc-0d0d1473258d@x69g2000hsx.googlegroups.com> <fkanuj$dlh$1@smc.vnet.net> <200712200516.AAA02315@smc.vnet.net>

On Dec 19, 2007, at 11:16 PM , dh wrote:

>
>
> Hi,
>
> consider:
>
> f[x_/;Dimensions[x]=={2,2}]:= ...
>

Dimensions alone strictly speaking isn't a strong enough test for the  
user's function.

In[188]:= Dimensions[g[g[1, 2], g[3, 4]]] == {2, 2}
Out[188]= True

:-)

Brett

> hope this helps, Daniel
>
>
>
> orelang at gmail.com wrote:
>
>> I want to define a function that accepts only one argument - a 2x2
>
>> matrix and not any more.
>
>>
>
>> Is it possible?
>
>>
>
>> orelang
>
>



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