Orange(datasets)
Orange()所属R语言包:datasets
Growth of Orange Trees
桔子树的生长
译者:生物统计家园网 机器人LoveR
描述----------Description----------
The Orange data frame has 35 rows and 3 columns of records of the growth of orange trees.
Orange数据框有35行和第3列的橙树的生长记录。
用法----------Usage----------
格式----------Format----------
This object of class c("nfnGroupedData", "nfGroupedData", "groupedData", "data.frame") containing the following columns:
本类c("nfnGroupedData", "nfGroupedData", "groupedData", "data.frame")包含下列对象:
an ordered factor indicating the tree on which the measurement is made. The ordering is according to increasing maximum diameter.
一个有序的因素,表明测量的树。的顺序是根据最大直径增加。
a numeric vector giving the age of the tree (days since 1968/12/31)
一个数值向量树的年龄(1968年12月31日以来的天)
a numeric vector of trunk circumferences (mm). This is probably “circumference at breast height”, a standard measurement in forestry.
的树干周长的数字矢量(毫米)。这可能是“围”,胸径在林业标准测量。
Details
详情----------Details----------
This dataset was originally part of package nlme, and that has methods (including for [, as.data.frame, plot and print) for its grouped-data classes.
此数据集原是包nlme部分,并具有分组数据类的方法(包括[,as.data.frame,plot和print) 。
源----------Source----------
Draper, N. R. and Smith, H. (1998), Applied Regression Analysis (3rd ed), Wiley (exercise 24.N).
德雷珀,NR和史密斯,H.(1998),应用回归分析(第三版),威利(运动24.N)。
Pinheiro, J. C. and Bates, D. M. (2000) Mixed-effects Models in S and S-PLUS, Springer.
皮涅伊罗,JC和Bates,DM(2000)混合效应模型在S和S-PLUS,施普林格。
举例----------Examples----------
require(stats); require(graphics)
coplot(circumference ~ age | Tree, data = Orange, show.given = FALSE)
fm1 <- nls(circumference ~ SSlogis(age, Asym, xmid, scal),
data = Orange, subset = Tree == 3)
plot(circumference ~ age, data = Orange, subset = Tree == 3,
xlab = "Tree age (days since 1968/12/31)",
ylab = "Tree circumference (mm)", las = 1,
main = "Orange tree data and fitted model (Tree 3 only)")
age <- seq(0, 1600, length.out = 101)
lines(age, predict(fm1, list(age = age)))
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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