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Re: Convert nxn matrix to a column vector with (n^2)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg83757] Re: [mg83705] Convert nxn matrix to a column vector with (n^2)
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Thu, 29 Nov 2007 06:42:07 -0500 (EST)
  • Reply-to: hanlonr at cox.net

n = 3;
nxn = Array[a, {n, n}]

{{a[1, 1], a[1, 2], a[1, 3]}, 
   {a[2, 1], a[2, 2], a[2, 3]}, 
   {a[3, 1], a[3, 2], a[3, 3]}}

List /@ Flatten[nxn]

{{a[1, 1]}, {a[1, 2]}, {a[1, 3]}, 
   {a[2, 1]}, {a[2, 2]}, {a[2, 3]}, 
   {a[3, 1]}, {a[3, 2]}, {a[3, 3]}}

List /@ Flatten[Transpose[nxn]]

{{a[1, 1]}, {a[2, 1]}, {a[3, 1]}, 
   {a[1, 2]}, {a[2, 2]}, {a[3, 2]}, 
   {a[1, 3]}, {a[2, 3]}, {a[3, 3]}}


Bob Hanlon

---- Tara.Ann.Lorenz at gmail.com wrote: 
> Any ideas how to convert an nxn matrix to a column vector with n^2
> elements?
> 



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