Daniel Nordlund <djnordlund <at> frontier.com> writes:
> > On Behalf Of Rosario Garcia Gil > > I have this matrix which I am trying to invert. I get a message about > > reciprocal condition number, what that does mean? [snip] > > Well, it means exactly what the message says. Within the precision of your computer, the matrix is singular > and has no inverse. If you try the following code you will see that column 1 is perfectly correlated with the > remaining columns. > > summary(lm(XT_X [,1] ~ XT_X[,-1])) > Depending on what you're trying to do, you might try the generalized inverse in the MASS package (MASS::ginv). ______________________________________________ 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.