Using the problem in rcurv1 with regression function gi(θ1, θ2) = θ1xi/(θ2 + xi), plot the sum-of-squares function S(θ1, θ2). Using the same starting point as in rcurv1, plot the trace of the...

Using the problem in rcurv1 with regression function gi(θ1, θ2) = θ1xi/(θ2 + xi), plot the sum-of-squares function S(θ1, θ2). Using the same starting point as in rcurv1, plot the trace of the Levenberg–Marquardt step (9.8.6) for values of λ from 0 to 1000.