R: Examples for 'MASS::rms.curv'

### ** Examples

# The treated sample from the Puromycin data
mmcurve <- deriv3(~ Vm * conc/(K + conc), c("Vm", "K"),
                  function(Vm, K, conc) NULL)
Treated <- Puromycin[Puromycin$state == "treated", ]
(Purfit1 <- nls(rate ~ mmcurve(Vm, K, conc), data = Treated,
                start = list(Vm=200, K=0.1)))

Nonlinear regression model
  model: rate ~ mmcurve(Vm, K, conc)
   data: Treated
       Vm         K 
212.68363   0.06412 
 residual sum-of-squares: 1195

Number of iterations to convergence: 6 
Achieved convergence tolerance: 6.096e-06

rms.curv(Purfit1)

Parameter effects: c^theta x sqrt(F) = 0.2121 
        Intrinsic: c^iota  x sqrt(F) = 0.092

##Parameter effects: c^theta x sqrt(F) = 0.2121
##        Intrinsic: c^iota  x sqrt(F) = 0.092

Examples for 'MASS::rms.curv'

Relative Curvature Measures for Non-Linear Regression