rq.fit.br(quantreg)
rq.fit.br()所属R语言包:quantreg
Quantile Regression Fitting by Exterior Point Methods
外观上位数回归的拟合方法
译者:生物统计家园网 机器人LoveR
描述----------Description----------
This function controls the details of QR fitting by the simplex approach embodied in the algorithm of Koenker and d'Orey based on the median regression algorithm of Barrodale and Roberts. Typically, options controlling the construction of the confidence intervals would be passed via the ...{} argument of rq().
此功能可以控制的细节的QR配件的Koenker和dOrey算法的基础上的中位数回归算法的Barrodale和罗伯茨体现在单一的方法。通常情况下,控制建设的置信区间的选项将被传递通过...{}rq()的参数。
用法----------Usage----------
rq.fit.br(x, y, tau=0.5, alpha=0.1, ci=FALSE, iid=TRUE, interp=TRUE, tcrit=TRUE)
参数----------Arguments----------
参数:x
the design matrix
设计矩阵
参数:y
the response variable
响应变量
参数:tau
the quantile desired, if tau lies outside (0,1) the whole process is estimated.
分位数的需要,如果头不在,(0,1),整个过程估计。
参数:alpha
the nominal noncoverage probability for the confidence intervals, i.e. 1-alpha is the nominal coverage probability of the intervals.
的的名义noncoverage概率的置信区间,即1-α是标称的覆盖概率的间隔。
参数:ci
logical flag if T then compute confidence intervals for the parameters using the rank inversion method of Koenker (1994). See rq() for more details. If F then return only the estimated coefficients. Note that for large problems the default option ci = TRUE can be rather slow. Note also that rank inversion only works for p>1, an error message is printed in the case that ci=T and p=1.
逻辑标志,如果T,则计算Koenker(1994)采用秩反演方法的参数的置信区间。见rq()更多详情。如果F,然后只返回系数。请注意,大问题的默认选项CI = TRUE可以是相当缓慢的。还要注意的是仅适用于P> 1级反转,打印错误消息的情况下,CI = T和p = 1。
参数:iid
logical flag if T then the rank inversion is based on an assumption of iid error model, if F then it is based on an nid error assumption. See Koenker and Machado (1999) for further details on this distinction.
逻辑标志,如果T,然后排名反转是基于一个假设独立同分布的误差模型,如果F是一个的NID错误假设的基础上。 Koenker和马查多(1999年)对这一区别的进一步细节。
参数:interp
As with typical order statistic type confidence intervals the test statistic is discrete, so it is reasonable to consider intervals that interpolate between values of the parameter just below the specified cutoff and values just above the specified cutoff. If interp = F then the 2 “exact” values above and below on which the interpolation would be based are returned.
典型的次序统计量类型的置信区间的检验统计量是离散的,所以它是合理的考虑时间间隔低于指定的截止频率和上面指定的截止值的参数值之间的插值。如果interp = F然后返回2“精确”的价值观上面和下面将根据插值。
参数:tcrit
Logical flag if T - Student t critical values are used, if F then normal values are used.
逻辑标志,如果T - 使用学生t临界值,如果F,然后使用正常价值。
Details
详细信息----------Details----------
If tau lies in (0,1) then an object of class "rq" is returned with various related inference apparatus. If tau lies outside [0,1] then an object of class rq.process is returned. In this case parametric programming methods are used to find all of the solutions to the QR problem for tau in (0,1), the p-variate resulting process is then returned as the array sol containing the primal solution and dsol containing the dual solution. There are roughly O(n log n) distinct solutions, so users should be aware that these arrays may be large and somewhat time consuming to compute for large problems.
如果头是(0,1),那么类"rq"的对象,则返回与各种相关的推理装置。如果头不在[0,1],然后一个对象的类rq.process的返回。在这种情况下,使用参数编程方法找到的所有解决方案的tau蛋白QR问题在(0,1),对变量的生成的过程然后返回作为含阵列硅溶胶的含双溶液的原始溶液和dsol 。有大致O(n log n)的不同的解决方案,让用户应该知道这些阵列可能会很大,有点耗费时间计算大问题。
值----------Value----------
Returns an object of class "rq" for tau in (0,1), or else of class "rq.process". Note that rq.fit.br when called for a single tau value will return the vector of optimal dual variables. See rq.object and rq.process.object for further details.
返回一个对象类"rq"头(0,1),或,其他类"rq.process"。请注意这rq.fit.br称为单头值时将返回最佳双变量向量。 rq.object和rq.process.object进一步的细节。
参考文献----------References----------
processes for quantile regression, J. of Am Stat. Assoc., 94, 1296-1310.
参见----------See Also----------
rq, rq.fit.fnb
rq,rq.fit.fnb
实例----------Examples----------
data(stackloss)
rq.fit.br(stack.x, stack.loss, tau=.73 ,interp=FALSE)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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