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The Soybean data frame has 412 rows and 5 columns.
This data frame contains the following columns:
a factor giving a unique identifier for each plot.
a factor indicating the variety; Forrest (F) or Plant Introduction #416937 (P).
a factor indicating the year the plot was planted.
a numeric vector giving the time the sample was taken (days after planting).
a numeric vector giving the average leaf weight per plant (g).
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.''
summary(fm1 <- nlsList(SSlogis, data = Soybean))
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