Examples for 'MASS::wtloss'

Weight Loss Data from an Obese Patient

Aliases: wtloss

Keywords: datasets

### ** Examples

## IGNORE_RDIFF_BEGIN
wtloss.fm <- nls(Weight ~ b0 + b1*2^(-Days/th),
    data = wtloss, start = list(b0=90, b1=95, th=120))
wtloss.fm

Nonlinear regression model
  model: Weight ~ b0 + b1 * 2^(-Days/th)
   data: wtloss
    b0     b1     th 
 81.37 102.68 141.91 
 residual sum-of-squares: 39.24

Number of iterations to convergence: 3 
Achieved convergence tolerance: 4.324e-06

## IGNORE_RDIFF_END
plot(wtloss)
with(wtloss, lines(Days, fitted(wtloss.fm)))
plot of chunk example-MASS-wtloss-1
[Package MASS version 7.3-58.2 Index]