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Re: Re: pattern

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84402] Re: [mg84377] Re: pattern
  • From: Daniel Huber <dh at metrohm.ch>
  • Date: Fri, 21 Dec 2007 03:25:00 -0500 (EST)
  • References: <3eb7b73d-e7dd-488e-abdc-0d0d1473258d@x69g2000hsx.googlegroups.com> <fkanuj$dlh$1@smc.vnet.net> <200712200516.AAA02315@smc.vnet.net> <32C1CC3A-C4AF-4C59-98B0-845EF4079EAE@wolfram.com>

Well, what about:
f[x_List/;Dimensions[x]=={2,2}]:= ...

Brett Champion wrote:
> 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
>>
>>
>
>
>

-- 

Daniel Huber
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CH-9100 Herisau
Tel. +41 71 353 8585, Fax +41 71 353 8907
E-Mail:<mailto:dh at metrohm.com>
Internet:<http://www.metrohm.ch>



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