IGF: Radioimmunoassay of IGF-I Protein

In MEMSS: Data sets from Mixed-effects Models in S

Description

The IGF data frame has 237 rows and 3 columns.

Format

This data frame contains the following columns:

Lot

an ordered factor giving the radioactive tracer lot.

age

a numeric vector giving the age (in days) of the radioactive tracer.

conc

a numeric vector giving the estimated concentration of IGF-I protein (ng/ml)

Details

Davidian and Giltinan (1995) describe data obtained during quality control radioimmunoassays for ten different lots of radioactive tracer used to calibrate the Insulin-like Growth Factor (IGF-I) protein concentration measurements.

Source

Davidian, M. and Giltinan, D. M. (1995), Nonlinear Models for Repeated Measurement Data, Chapman and Hall, London.

Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York. (Appendix A.11)

Examples

str(IGF)

Example output

Loading required package: lme4
Loading required package: Matrix

Attaching package: 'MEMSS'

The following objects are masked from 'package:datasets':

    CO2, Orange, Theoph

'data.frame':	237 obs. of  3 variables:
 $ Lot : Factor w/ 10 levels "1","10","2","3",..: 1 1 1 1 1 1 1 1 1 1 ...
 $ age : num  7 7 8 8 13 13 14 14 15 15 ...
 $ conc: num  4.9 5.68 5.32 5.5 4.94 5.19 5.18 5.67 5.02 5.88 ...

MEMSS documentation built on May 2, 2019, 5:50 p.m.