Re: Sort problem
- To: mathgroup at smc.vnet.net
- Subject: [mg81709] Re: Sort problem
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Tue, 2 Oct 2007 05:31:26 -0400 (EDT)
- Organization: Uni Leipzig
- References: <fdqd33$n6m$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
you think that symbol1 < symbol2 is evaluated to True or False
but this is not the case and a<r is left unevaluate as symbolic
expression and can't used as an order relation.
Can you explain whar a<r should mean ?
Regards
Jens
Donald DuBois wrote:
> Hello,
>
> This Sort works
>
> In[32]:= Sort[{r, a, x}]
>
> Out[32]= {a, r, x}
>
> but this one doesn't:
>
> In[33]:= Sort[{{r, 2}, {a, 3}, {x, 4}}, #1[[1]] < #2[[1]] &]
>
> Out[33]= {{r, 2}, {a, 3}, {x, 4}}
>
>
> What am I doing wrong?
>
> Don
>