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MathGroup Archive 2006

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Re: Multiplying Elements of arrays: Inner product

  • To: mathgroup at smc.vnet.net
  • Subject: [mg68519] Re: Multiplying Elements of arrays: Inner product
  • From: Gopinath Venkatesan <gopinathv at ou.edu>
  • Date: Wed, 9 Aug 2006 04:18:08 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Thanks to all of you who suggested me ideas.

Yes, its easy to directly calculate the dot product of two matrices cd and ab as, ef = cd.ab (symbols as defined in my question). This question is a simplification of my original problem.

The reason I wanted to do this because I had to calculate only the product of certain section of a matrix cd with corresponding elements of column vector or another matrix.

I am also thinking of using direct multiplication of entire matrices cd and ab as such and then extracting the values of appropriate location to some dummy matrix. But if I make my previous procedure to work, I will understand better about the usage of double square closed brackets.

Thanks,

Gopinath Venkatesan
Graduate Student,
University of Oklahoma


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