Re: Variant of inner Product ...
- To: mathgroup at smc.vnet.net
- Subject: [mg56735] Re: Variant of inner Product ...
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Thu, 5 May 2005 06:01:18 -0400 (EDT)
- Organization: Uni Leipzig
- References: <d59jtg$69m$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, Inner[f, A, g @@@ B] /. g -> List Regards Jens "Detlef Müller" <=?ISO-8859-1?Q?Detlef_M=FCller?=> schrieb im Newsbeitrag news:d59jtg$69m$1 at smc.vnet.net... > Hello, > > I have the following to do: > > Given > > In[1]:= A={1,2,3}; B={{a,b},{c,d},{r,s}}; > > And a Function f, I like to have > > Out[2] = > {f[1,a],f[1,b]}+{f[2,c],f[2,d]}+{f[3,r],f[3,s]} > > The trial > > In[8]:=A={1,2,3}; B={{a,b},{c,d,e},{r,s}}; > In[9]:= Inner[f,A,B] > Out[9]= f[1,{a,b}]+f[2,{c,d,e}]+f[3,{r,s}] > > looks promising, > but if the Lists in B have the same length, > "Inner" > makes something different: > > In[15]:= > A={1,2,3}; B={{a,b},{c,d},{r,s}}; Inner[f,A,B] > > Out[16]= > {f[1,a]+f[2,c]+f[3,r],f[1,b]+f[2,d]+f[3,s]} > > So for now I have an ugly Table-Construction > doing the job, > but I can't imagine there is no elegant and > clear solution > for this ... any suggestions? > > Greetings, > Detlef >