Re: replacement rule and sparsearray question
- To: mathgroup at smc.vnet.net
- Subject: [mg71320] Re: replacement rule and sparsearray question
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Wed, 15 Nov 2006 06:43:09 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <ejc4i2$6k9$1@smc.vnet.net>
Arkadiusz.Majka at gmail.com wrote:
> Hi,
>
> How can I apply a replacement rule to sparse array, e.g
>
> SparseArray[{1,2,3}]/.{2->222}
>
> and obtain the same result as for {1,2,3}/.{2->222} (what is {1,222,3}.
>
> I DON'T want to call Normal before.
>
> Thanks,
>
> arek
>
SparseArray[{1, 2, 3} /. {2 -> 222}];
FullForm[%]
MatrixForm[%]
--> SparseArray[Automatic,List[3],0,List[1,List[List[0,3],List[List[
1],List[2],List[3]]],List[1,222,3]]]
Regards,
Jean-Marc