search for: mwb3b

...Following his advice and constraining the location parameters (a, and a1 in the mixture distribution of 3-parameter Weibull density) in the objective function, my first attempt fitting the mixture distribution seemed successful: > mwb.test3 <- optim(c(0.6,8.87, 100, 4.0, 0.001, 89.1, 2.99), mwb3b.obj, x = x5, hessian = T, + control = list(maxit = 2000)) Warning messages: 1: NaNs produced in: log(x) 2: NaNs produced in: log(x) 3: NaNs produced in: log(x) 4: NaNs produced in: log(x) 5: NaNs produced in: log(x) 6: NaNs produced in: log(x) 7: NaNs produced in: log(x) 8: NaNs pr...