Yimeng Lu <yl2058 <at> columbia.edu> writes: > Could you give me some advice in > solving the problem of such error message from gnls and nls? > ## begin error message > > "Problem in gnls(y1 ~ glogit4(b, c, m, t, x), data.frame(x..: Step halving > factor reduced below minimum in NLS step " >
Try to set nlsTol in the optional control parameter (gnlsControl) to a larger value, e.g. 0.1 instead of default 0.001, but be sure to check your results make sense. If this should help, you can try intermediate values. Dieter Menne ______________________________________________ [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
