r how to fit parameter to curve why use nested parameters in r which parameter can be shared across two data sets what is the nls curve ngls curve fitting nls curve fitting of nested parameters nls curve fitting shared parameters what is reso curve nested parameter can you nested parameters in nls data r curve fitting shared parameters which parameter is shared across multiple nls curves can you share nested parameters nls curve fitting definition nls curve fitting how to use a nested parameter in nls can i combine nested or shared parameters how to share parameters with curves why use nested or shared parameters how to share the parameters across data on curve what is nested parameter in curve fitting