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Re: Equal and operation with list

  • To: mathgroup at
  • Subject: [mg29520] Re: Equal and operation with list
  • From: Tom Burton <tburton at>
  • Date: Sat, 23 Jun 2001 01:47:00 -0400 (EDT)
  • Organization: Brahea Consulting
  • References: <9guom2$nvh$>
  • Sender: owner-wri-mathgroup at

A compact solution is

MapThread[#1 == #2 . X & , {Y, B}]

but if you are new to Mathematica, MapThread may be a bit much; so try

#1 == #2.X & @@@ Transpose[{Y, B}]

or, less cryptically,

Apply[Function[{y, b}, y == b.X], Transpose[{Y, B}], 1]

Tom Burton

On Fri, 22 Jun 2001 06:30:26 +0000 (UTC), in comp.soft-sys.math.mathematica you wrote:

>I  have tree list:
>Y = {y1, y2}
>B = {{b11,b12} , {b21, b22}}
>X = {X1, X2}
>I wish transform its in a system of equations like this:
>{y1== b11 X1 + b12 X2, y2== b21 X1 + b22 X2}
>I have test with Y == Dot[B,X] but don`t work. Any help?. Thanks


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