missed a c(...) here, therefore no par defined. On Mar 23, 2010, at 12:58 PM, ApproxGaussian wrote: > par<-(e.1,e.2,e.3,e.4,e.5,e.6,e.7,e.8,e.9,e.10,e.11,e.12,e.13,e.14,e. > 15,e.16,e.17,e.18,e.19,e.20,e.21,e.22,e.23,e.24,e.25,e.26,e.27,e.28)