milk {MethComp}

Measurement of fat content of human milk by two different methods.

Description

Fat content of human milk determined by measurement of glycerol released by enzymic hydrolysis of triglycerides (Trig) and measurement by the Standard Gerber method (Gerber). Units are (g/100 ml).

Format

A data frame with 90 observations on the following 3 variables.

meth

a factor with levels Gerber Trig

item

sample id

y

a numeric vector

Source

The dataset is adapted from table 3 in: JM Bland and DG Altman: Measuring agreement in method comparison studies. Statistical Methods in Medical Research, 8:136-160, 1999. See: Lucas A, Hudson GJ, Simpson P, Cole TJ, Baker BA. An automated enzymic micromethod for the measurement of fat in human milk. Journal of Dairy Research 1987; 54: 487-92.

Examples

data(milk)
str(milk)
milk <- Meth(milk)
plot(milk)
abline(0,1)