Hi everybody, How can get some information about error "step factor reduced below minimum" appeared after nls function. Thanks Regards N.VALIERE ************************************************ VALIERE Nathaniel Laboratoire Biometrie et Biologie Evolutive UMR5558 43, boulevard du 11 Novembre 1918 F69622 VILLEURBANNE Cedex FRANCE ************************************************ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
VALIERE Nathaniel <valiere at biomserv.univ-lyon1.fr> writes:> How can get some information about error "step factor reduced below > minimum" appeared after nls function.The best way to see what is causing this is to use trace=TRUE in the call to nls, which will then print the parameter values at each iteration. The error message indicates that the iterations are reaching a point where the increment is ill-defined. You will need to determine better starting estimates for the parameters or perhaps reduce the complexity of the model. I am happy to correspond privately with you on what might be happening in this case if you want to send me specifics on the model and the data. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._