Berend Hasselman wrote: > > > Joseph P Gray wrote: >> I submit the following matrix to both MATLAB and R >> >> x= 0.133 0.254 -0.214 0.116 >> 0.254 0.623 -0.674 0.139 >> -0.214 -0.674 0.910 0.011 >> 0.116 0.139 0.011 0.180 >> >> MATLAB's inv(x) provides the following >> 137.21 -50.68 -4.70 -46.42 >> -120.71 27.28 -8.94 62.19 >> -58.15 6.93 -7.89 36.94 >> 8.35 11.17 10.42 -14.82 >> >> R's solve(x) provides: >> 261.94 116.22 150.92 -267.78 >> 116.22 344.30 286.68 -358.30 >> 150.92 286.68 252.96 -334.09 >> -267.78 =358.30 -334.09 475.22 >> >> > > The matrix x is clearly symmetric. Therefore I expect a symmetric inverse of > x. > The result of Matlab's inv(x) is clearly not symmetric. > R's result is symmetric. > > I find what is shown as Matlab's result difficult to believe.
Yes. See my earlier post. (Well. I believe it, but not with the same input!) -- O__ ---- Peter Dalgaard Ă˜ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907 ______________________________________________ R-help@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.