wtloss {MASS}R Documentation

Weight Loss Data from an Obese Patient

Description

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.

Usage

data(wtloss)

Format

This data frame contains the following columns:

Days
Time in days since the start of the programme.
Weight
Weight in kilograms of the patient.

Source

Dr T. Davies, Adelaide.

Examples

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

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