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Re: Re: A question about pattern

• To: mathgroup at smc.vnet.net
• Subject: [mg53855] Re: [mg53849] Re: [mg53815] A question about pattern
• From: Daohua Song <ds2081 at columbia.edu>
• Date: Sun, 30 Jan 2005 03:18:16 -0500 (EST)
• References: <200501280744.CAA00380@smc.vnet.net> <200501291103.GAA24762@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Dear ALL,
      Thanks for the kind reply. Really appreiate it.
      :)
Daohua

On Sat, 29 Jan 2005, yehuda ben-shimol wrote:

> You need to use condition (/;)
> myList=Range[10];
> ReplaceList[myList, ({a___, b_, c_, d___} /; c > b) -> {a, 2 b, 3 c, d}]
> will return
> {{2, 6, 3, 4, 5, 6, 7, 8, 9, 10},
> {1, 4, 9, 4, 5, 6, 7, 8, 9, 10},
> {1, 2, 6, 12, 5, 6, 7, 8, 9, 10},
> {1, 2, 3, 8, 15, 6, 7, 8, 9, 10},
> {1, 2, 3, 4, 10, 18, 7, 8, 9, 10},
> {1, 2, 3, 4, 5, 12, 21, 8, 9, 10},
> {1, 2, 3, 4, 5, 6, 14, 24, 9, 10},
> {1, 2, 3, 4, 5, 6, 7, 16, 27, 10},
> {1, 2, 3, 4, 5, 6, 7, 8, 18, 30}}
>
> yehuda
>
>
> Daohua Song wrote:
>
>> Dear Group,
>>      I am just struggling by the following question: I want to build a
>> rule like this,
>>      List/.{a___,b_,c_?(#>b&),d___}->{a,2 b,3 c,d}
>>      But it doesn't work.
>>
>>      please help me! Thanks
>> DHSONG
>>
>>
>>
>

• References:
  • A question about pattern
    • From: Daohua Song <ds2081@columbia.edu>
  • Re: A question about pattern
    • From: yehuda ben-shimol <benshimo@bgu.ac.il>