Dear R Fans, I have a simple probem but cannot find any reference to the soultion. I want to do calculations with small numbers (for max likelihood estimations). The lowest value R is storing by default is 1*10^-323, a smaller numer like 1*10^-324 is stored as a 0. How can I circumvent this problem? Is there a way to define how small a number can be in R. Thanks for a reply in advance, Marc -- Sensationsangebot verl?ngert: GMX FreeDSL - Telefonanschluss + DSL f?r nur 16,37 Euro/mtl.!* http://dsl.gmx.de/?ac=OM.AD.PD003K1308T4569a
Hi use the logarithmic representation for your problem. The Brobdingnag package uses such a form in a (more-or-less) user-transparent manner. HTH rksh Marc Jekel wrote:> Dear R Fans, > > I have a simple probem but cannot find any reference to the soultion. > > I want to do calculations with small numbers (for max likelihood estimations). The lowest value R is storing by default is 1*10^-323, a smaller numer like 1*10^-324 is stored as a 0. How can I circumvent this problem? Is there a way to define how small a number can be in R. > > Thanks for a reply in advance, > > Marc >-- Robin K. S. Hankin Uncertainty Analyst University of Cambridge 19 Silver Street Cambridge CB3 9EP 01223-764877