On 16 Jan 2003 at 22:15, Yan Yu wrote: > HI, > i have some prob when i try to use nls(). > my data is 1D vector, I tried to use a polynomial function(order is 3) to > fit it. > the data series is stored in x. > the a0, a1, a2, a3 below is coefficient, which i hope i can get from > calls "nls" > > > z <- nls( ~ a0 + a1 * x + a2 * x * x + a3 * x * x * x, data = x )
You haven't given a response in the formula? nls could possibly give a more informative error message. Kjetil Halvorsen > Error in match.call(definition, call, expand.dots) : > .Primitive... is not a function > > Any idea on what is the problem? > > many thanks, > yan > > ______________________________________________ > [EMAIL PROTECTED] mailing list > http://www.stat.math.ethz.ch/mailman/listinfo/r-help ______________________________________________ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
