Description Format Details Source Examples
The IGF
data frame has 237 rows and 3 columns.
This data frame contains the following columns:
an ordered factor giving the radioactive tracer lot.
a numeric vector giving the age (in days) of the radioactive tracer.
a numeric vector giving the estimated concentration of IGF-I protein (ng/ml)
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.
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)
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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 ...
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