[Rd] least squares with solve: leading minor is not positive definite
Tamas K Papp
tpapp at Princeton.EDU
Wed Nov 29 17:29:29 CET 2006
Hi,
I am following the "Comparing Least Squares Calculations" vignette of
the Matrix package to get a least squares solution x for
MM %*% x == mu$utility
I get the following error message:
Error in solve(crossprod(MM), crossprod(MM, mu$utility)) :
the leading minor of order 1079 is not positive definite
I thought that the least squares was always defined... What can I do
about this?
Tamas
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