Soybean {nlme} | R Documentation |

## Growth of soybean plants

### Description

The `Soybean`

data frame has 412 rows and 5 columns.

### Format

This data frame contains the following columns:

- Plot
- a factor giving a unique identifier for each plot.
- Variety
- a factor indicating the variety; Forrest (F) or Plant
Introduction #416937 (P).
- Year
- a factor indicating the year the plot was planted.
- Time
- a numeric vector giving the time the sample was taken (days
after planting).
- weight
- a numeric vector giving the average leaf weight per plant (g).

### Details

These data are described in
Davidian and Giltinan (1995, 1.1.3, p.7) as ``Data from an
experiment to compare growth patterns of two genotypes of soybeans:
Plant Introduction #416937 (P), an experimental strain, and Forrest
(F), a commercial variety.''

### Source

Pinheiro, J. C. and Bates, D. M. (2000), *Mixed-Effects Models in S
and S-PLUS*, Springer, New York. (Appendix A.27)

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

### Examples

summary(fm1 <- nlsList(SSlogis, data = Soybean))

[Package

*nlme* version 3.1-57

Index]