intervals.lme(nlme)
intervals.lme()所属R语言包:nlme
Confidence Intervals on lme Parameters
LME参数的置信区间
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Approximate confidence intervals for the parameters in the linear mixed-effects model represented by object are obtained, using a normal approximation to the distribution of the (restricted) maximum likelihood estimators (the estimators are assumed to have a normal distribution centered at the true parameter values and with covariance matrix equal to the negative inverse Hessian matrix of the (restricted) log-likelihood evaluated at the estimated parameters). Confidence intervals are obtained in an unconstrained scale first, using the normal approximation, and, if necessary, transformed to the constrained scale. The pdNatural parametrization is used for general positive-definite matrices.
线性混合效应模型代表object参数的近似置信区间的取得,使用的分配(限制)最大似然估计(估计假设有一个正常的分布集中在一个正常的逼近真正的参数值和协方差矩阵等于负逆Hessian矩阵(限制)对数似然估计参数评估)。置信区间得到一个无约束的规模第一,使用正常的近似,如有必要,转化为限制规模。 pdNatural参数化用于一般正定矩阵。
用法----------Usage----------
## S3 method for class 'lme'
intervals(object, level, which, ...)
参数----------Arguments----------
参数:object
an object inheriting from class lme, representing a fitted linear mixed-effects model.
一个对象从lme类代表拟合的线性混合效应模型,继承。
参数:level
an optional numeric value with the confidence level for the intervals. Defaults to 0.95.
可选数值为间隔的信心水平。默认值为0.95。
参数:which
an optional character string specifying the subset of parameters for which to construct the confidence intervals. Possible values are "all" for all parameters, "var-cov" for the variance-covariance parameters only, and "fixed" for the fixed effects only. Defaults to "all".
一个可选的字符串指定的参数的子集来构建置信区间。可能的值是"all"所有参数,"var-cov"只为协方差参数,"fixed"为固定效应。 "all"默认。
参数:...
some methods for this generic require additional arguments. None are used in this method.
这个通用的一些方法需要额外的参数。没有使用这种方法。
值----------Value----------
a list with components given by data frames with rows corresponding to parameters and columns lower, est., and upper representing respectively lower confidence limits, the estimated values, and upper confidence limits for the parameters. Possible components are:
与相应的参数和列与行的数据框的组件列表lower,est.,upper代表分别低信心的限制,估计值,参数和上置信限。可能的组成部分是:
参数:fixed
fixed effects, only present when which is not equal to "var-cov".
固定效应,只提出当which是不是等于"var-cov"的。
参数:reStruct
random effects variance-covariance parameters, only present when which is not equal to "fixed".
随机效应的方差 - 协方差参数,只提出当which是不是等于"fixed"的。
参数:corStruct
within-group correlation parameters, only present when which is not equal to "fixed" and a correlation structure is used in object.
组内相关参数,只提出当which不等于"fixed"和相关的结构object。
参数:varFunc
within-group variance function parameters, only present when which is not equal to "fixed" and a variance function structure is used in object.
组内方差函数的参数,只提出当which不等于"fixed"和方差函数的结构object。
参数:sigma
within-group standard deviation.
组内标准差。
作者(S)----------Author(s)----------
Jose Pinheiro and Douglas Bates <a href="mailto:bates@stat.wisc.edu">bates@stat.wisc.edu</a>
参考文献----------References----------
in S and S-PLUS", Springer.
参见----------See Also----------
lme, intervals, print.intervals.lme,
lme,intervals,print.intervals.lme
举例----------Examples----------
fm1 <- lme(distance ~ age, Orthodont, random = ~ age | Subject)
intervals(fm1)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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