non linear least squares

  1. B

    Nonlinear least squares method and its assumptions

    I know that when estimating and using ordinary least squares, irregular terms have to be iid N(0, σ2 ). Now I want to use nonlinear least squares method for estimations. Are there any specific conditions that irregular terms have to fullfill? Or do they have to be still iid N(0, σ2 )? Thank...
  2. S

    p-value and estimation of parameters with non linear least squares

    Hi I am performing an estimation of some parameters . I Have the next data: I am using nls.lm() function, and I am trying to fit this data to a logistic distribution. In order to realize this I have defined the next things in R. edad<-datos$Age u_x<-datos$mx...