Orthodont(nlme)
Orthodont()所属R语言包:nlme
Growth curve data on an orthdontic measurement
生长曲线上orthdontic测量数据
译者:生物统计家园网 机器人LoveR
描述----------Description----------
The Orthodont data frame has 108 rows and 4 columns of the change in an orthdontic measurement over time for several young subjects.
Orthodont数据框有108行和4列,随着时间的推移,几个年轻的学科orthdontic测量的变化。
格式----------Format----------
This data frame contains the following columns:
这个数据框包含下列资料:
a numeric vector of distances from the pituitary to the pterygomaxillary fissure (mm). These distances are measured on x-ray images of the skull.
垂体翼上颌裂的距离(毫米)的数字向量。这些距离测量颅骨的X射线图像。
a numeric vector of ages of the subject (yr).
一个主体的年龄(岁)的数字向量。
an ordered factor indicating the subject on which the measurement was made. The levels are labelled M01 to M16 for the males and F01 to F13 for the females. The ordering is by increasing average distance within sex.
一个有序的因素,表明了测量的主题。水平标M01M16的男性和F01F13女性。排序是通过增加内性行为的平均距离。
a factor with levels Male and Female
同层次的因素Male和Female
Details
详情----------Details----------
Investigators at the University of North Carolina Dental School followed the growth of 27 children (16 males, 11 females) from age 8 until age 14. Every two years they measured the distance between the pituitary and the pterygomaxillary fissure, two points that are easily identified on x-ray exposures of the side of the head.
在北卡罗莱纳州大学牙科学院的研究人员随后从8岁的27名儿童(男16例,女11),直到14岁的增长。每隔两年,他们测量了垂体和翼上颌裂,两个X射线照射头部一侧,很容易确定点之间的距离。
源----------Source----------
Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York. (Appendix A.17)
皮涅罗JC和贝茨,DM(2000),在S,S-PLUS,施普林格,纽约混合效应模型。 (附录A.17)
Potthoff, R. F. and Roy, S. N. (1964), “A generalized multivariate analysis of variance model useful especially for growth curve problems”, Biometrika, 51, 313–326.
potthoff,射频和罗伊,SN(1964),“广义多元分析方差模型有用,尤其是生长曲线问题”,Biometrika,51,313-326。
举例----------Examples----------
formula(Orthodont)
plot(Orthodont)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
注1:为了方便大家学习,本文档为生物统计家园网机器人LoveR翻译而成,仅供个人R语言学习参考使用,生物统计家园保留版权。
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