From: Hazura Zulzalil <hazura.zulzalil_at_gmail.com>

Date: Tue, 08 Apr 2008 10:00:51 +0800

*> a5 <- c(71.93, 82.04, 83.05, 85.99)
*

*> a6 <- c(60.94, 71.12, 63.61, 69.47)
*

*>
*

*> ##preference threshold relative
*

*> ## to the preorder of the alternatives
*

*>
*

*> C<- rbind (a1, a2, a3, a4, a5, a6)
*

*> overall <- c (79, 78, 79.5, 77.5, 80, 78.5)
*

*>
*

*> rk.proto <- rbind (c(5,3), c(3,1), c(1,6), c(6,4), c(4,2))
*

*>
*

*>
*

*> Asp <-rbind (c(1,2,-delta.S), c(2,1,-delta.S), c(3, 4,-delta.S), c(4, 3,
*

-delta.S))

*>
*

*> ## an interaction preorder constraint matrix
*

*> delta.I <- 0.05
*

*> Aii <- rbind (c(1,2,-1,-delta.I), c(1,3,delta.I, 1), c (1,4,-1,-delta.I),
*

+ c(2,3, delta.I,1), c(2, 4,-1,-delta.I), c(3,4,delta.I, 1))

*>
*

*>
*

*> gls <-ls.ranking.capa.ident(4,2,C, rk.proto,0.5, A.Shapley.preorder = Asp,
*

A.interaction.interval = Aii)

Error in drop(.Call("La_dgesv", a, as.matrix(b), tol, PACKAGE = "base")) : system is computationally singular: reciprocal condition number = 4.68861e-18

R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Tue 08 Apr 2008 - 02:08:31 GMT

Date: Tue, 08 Apr 2008 10:00:51 +0800

I'm trying to run the generalized least square approach for my 2-additive
problem,

unfortunately this error appeared. I have tried to figure out the error from
the mailing list

but couldn't find the solution. Any help is highly appreciated.
This is my source code:

>a1 <- c(76.18, 61.84, 60.4, 69.09)

> a2 <- c(51.01, 50.39, 87.62, 52.03)> a3 <- c(80.08, 48.49, 90.86, 76.11)> a4 <- c(57.71, 38.99, 88.7, 53.12)

-delta.S))

+ c(2,3, delta.I,1), c(2, 4,-1,-delta.I), c(3,4,delta.I, 1))

A.interaction.interval = Aii)

Error in drop(.Call("La_dgesv", a, as.matrix(b), tol, PACKAGE = "base")) : system is computationally singular: reciprocal condition number = 4.68861e-18

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