wtloss {MASS} | R Documentation |
The data frame gives the weight, in kilograms, of an obese patient at 52 time points over an 8 month period of a weight rehabilitation programme.
wtloss
This data frame contains the following columns:
Days
time in days since the start of the programme.
Weight
weight in kilograms of the patient.
Dr T. Davies, Adelaide.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
wtloss.fm <- nls(Weight ~ b0 + b1*2^(-Days/th), data = wtloss, start = list(b0=90, b1=95, th=120)) wtloss.fm plot(wtloss) with(wtloss, lines(Days, fitted(wtloss.fm)))