Re: Dot or Inner ... but not quite
- To: mathgroup at smc.vnet.net
- Subject: [mg79714] Re: Dot or Inner ... but not quite
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 2 Aug 2007 03:56:00 -0400 (EDT)
- Organization: Uni Leipzig
- References: <f8n2rc$lp9$1@smc.vnet.net> <f8phgv$1ca$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Sorry,
I for got the
Plus @@ (l1*l2)
Regards
Jens
Jens-Peer Kuska wrote:
> Hi,
>
> and
>
> l1*l2
>
> ??
>
>
> Regards
> Jens
> Diamond, Mark wrote:
>> I have two equi-length lists, the first of number, the second of
>> (equi-length) lists of numbers , such as
>>
>> l1={1,4,3};
>> l2={{1,7},{1,9},{5,2}};
>>
>> I want to produce 1*{1,7}+4*{1,9}+3*{5,2}
>>
>> It looks so close to Inner that I thought I could use it in some form, but I
>> have ended up using
>>
>> (#[[1]]*#[[2]])& /@ Transpose[{l1,l2}]
>>
>> Is there a better way using one of the builtin functions with which I am
>> unfamiliar?
>>
>> Cheers,
>>
>> Mark Diamond
>>
>>
>>
>