On 2/3/07, pu chen <[EMAIL PROTECTED]> wrote: > hello, > I have to calculate the determinants of near singular matrices. Presently R > just stop at the precision of 2.16 e-16.
I'm not sure what you mean by that. Can you explain how you determined that number, perhaps including some code? It happens that on many systems that number is close to the relative machine precision. For example, on my version of R > .Machine$double.eps [1] 2.220446e-16 > Can some one tell me how can I set the precision of zero in R ? If you mean how could you change R so that it would give infinitely precise floating point representations for which the relative machine precision is zero I think the only answer is "by magic". In the real world we need to work with the floating point representations on the computers that we have access to. Perhaps you could rethink the calculation you are attempting to perform. ______________________________________________ [email protected] 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.
