Re: error: `eig' undefined near line 5 column 7

[Rich Shepard]

On Sat, 31 Jul 2004, Geraint Paul Bevan wrote:

> Is this the same method as the Analytic Hierarchy Process (AHP)? If so,
> according to [1], there are 3 criteria for a consistent comparison:
>
> aij=wi/wj=1/aji, aii=1.0, aik x akj=aij, (i, j, k=1, 2, & n).
>
> It doesn't look like the matrix from your book satisfies the last of
> these. For i=1,j=2,k=3, for example:
>
> (a13=1/2)*(a32=1/3) != (a12=1/3)

Geraint,

  Ah! Exactly right. That's what I get for carelessly taking part of a
matrix and not the entire thing.

> [1] Júlíus Sólnes, Environmental quality indexing of large industrial
> development alternatives using AHP, Environmental Impact Assessment
> Review, Volume 23, Issue 3, May 2003, Pages 283-303.
> (http://www.sciencedirect.com/science/article/B6V9G-48CX6KS-1/2/cb6aed0fbf6f24b3ac2efad7df03fe7c)

  I wasn't aware of this paper. Thanks for both pointers.

Rich

-- 
Dr. Richard B. Shepard, President
Applied Ecosystem Services, Inc. (TM)
<http://www.appl-ecosys.com>



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