rqmcmb(rqmcmb2)
rqmcmb()所属R语言包:rqmcmb2
Markov Chain Marginal Bootstrap for Quantile Regression
马氏链边际引导的分位数回归
译者:生物统计家园网 机器人LoveR
描述----------Description----------
MCMB for Quantile Regression (also see
中间相炭微球分位数回归(也请参见
用法----------Usage----------
rqmcmb(x=x, y=y, tau=0.5, K=100, int=TRUE,
plotTheta=FALSE)
参数----------Arguments----------
参数:x
a data matrix (n by p) for the design variables whose rows correspond to cases
数据矩阵(由p)为设计变量的行对应的情况
参数:y
a response vector of length n
长度为n的响应矢量
参数:tau
a percentile level between 0 and 1. Default at 0.5 for the median
介于0和1之间的百分位数水平。默认情况下在0.5的中位数
参数:K
length of the MCMB sequence. Default is 100
的中间相炭微球的序列的长度。默认值是100
参数:plotTheta
TRUE or FALSE for plotting the MCMB sequence. Default to FALSE
TRUE或FALSE绘制的MCMB序列。默认为false
参数:int
should be set to TRUE if the intercept is to be included in the model, and to FALSE if no intercept is desired. Default is TRUE.
应设置为TRUE,如果是包含在模型中,并为FALSE,如果没有拦截拦截。默认值是TRUE。
值----------Value----------
A list with the following components: <table summary="R valueblock"> <tr valign="top"><td>coef</td> <td> the parameter estimate from rq()</td></tr> <tr valign="top"><td>theta</td> <td> a matrix containing the MCMB sequence. The first row is the initial parameter estimate from rq()</td></tr> <tr valign="top"><td>success</td> <td> returns 1 if MCMB is successful. A value of 0 indicates that the program fails to return a desired MCMB sequence</td></tr> <tr valign="top"><td>cn</td> <td> condition number of the X'X matrix.</td></tr> </table>
有以下组件的列表:<table summary="R valueblock"> <tr valign="top"> <TD> coef</ TD> <TD>的参数估计从RQ()</ TD> </ TR> <tr valign="top"> <TD>theta</ TD> <td>一个矩阵包含MCMB序列。第一行是初始参数估计,从RQ()</ TD> </ TR> <tr valign="top"> <TD>success </ TD> <TD>返回1,如果MCMB是成功的。值为0表示程序未返回所需的中间相炭微球</ TD> </ TR> <tr valign="top"> <TD> cn </ TD> <TD>条件数的序列:XX基质。</ TD> </ TR> </ TABLE>
警告----------WARNING ----------
The MCMB may not be suitable for problems of small sample sizes. Severe collinearity in the x matrix
样本量小的问题,,MCMB可能不适合。严重的多重共线性的X矩阵
(作者)----------Author(s)----------
Maria Kocherginsky
(mkocherg@health.bsd.uchicago.edu) and Xuming He (x-he@uiuc.edu)
参考文献----------References----------
Kocherginsky, M., He, X. Extensions of the Markov Chain Marginal Bootstrap. Statistics & Probability Letters, in press.
Kocherginsky M, He X, Mu Y. (2005). Practical confidence intervals for regression quantiles. Journal of Computational and Graphical Statistics 14:41-55, 2005.
Kocherginsky, M. (2003). Extensions of the Markov Chain Marginal Bootstrap. Ph.D Thesis, University of Illinois Urbana-Champaign.
He, X. and Hu, F. (2002). Markov Chain Marginal Bootstrap. Journal of the American Statistical Association , Vol. 97, no. 459, 783-795.
参见----------See Also----------
rq
rq
实例----------Examples----------
library(quantreg)
x <- cbind(rnorm(100), runif(100))
y <- rnorm(100)
#generate the MCMB sequence:[生成中间相炭微球顺序:]
mcmb <- rqmcmb(x, y, tau=.5, plotTheta=FALSE)
#get MCMB estimates of mean, SD, and CI:[得到的MCMB估计的均值,SD和CI:]
rqmcmb.ci(mcmb)
#plot the MCMB sequences:[绘制MCMB序列:]
rqmcmb.plot(mcmb)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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