rms.curv(MASS)
rms.curv()所属R语言包:MASS
Relative Curvature Measures for Non-Linear Regression
非线性回归的相对曲率措施
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Calculates the root mean square parameter effects and intrinsic relative curvatures, c^theta and c^iota, for a fitted nonlinear regression, as defined in Bates & Watts, section 7.3, p. 253ff
计算均方根参数影响和内在的相对曲率,c^theta和c^iota,拟合非线性回归在贝茨瓦,7.3节,定义。 253ff
用法----------Usage----------
rms.curv(obj)
参数----------Arguments----------
参数:obj
Fitted model object of class "nls". The model must be fitted using the default algorithm.
拟合模型对象类"nls"。必须安装使用默认的算法模型。
Details
详情----------Details----------
The method of section 7.3.1 of Bates & Watts is implemented. The function deriv3 should be used generate a model function with first derivative (gradient) matrix and second derivative (Hessian) array attributes. This function should then be used to fit the nonlinear regression model.
贝茨和瓦7.3.1节的方法来实现。功能deriv3应使用生成模型与一阶导数(梯度)矩阵和二阶导数(黑森州)数组属性的功能。这个函数然后应使用适合非线性回归模型。
A print method, print.rms.curv, prints the pc and ic components only, suitably annotated.
一种打印方法,print.rms.curv,版画pc和ic组件,适当的注解。
If either pc or ic exceeds some threshold (0.3 has been suggested) the curvature is unacceptably high for the planar assumption.
如果任pc或ic超过某个阈值(0.3已建议)的曲率为平面的假设是不可接受的。
值----------Value----------
A list of class rms.curv with components pc and ic for parameter effects and intrinsic relative curvatures multiplied by sqrt(F), ct and ci for c^θ and c^ι (unmultiplied), and C the C-array as used in section 7.3.1 of Bates & Watts.
一类列表rms.curv组件pc和ic参数的影响和内在的相对曲率乘以SQRT(女),ct和ci< x>和c^θ(未经过相乘),c^ιC - 阵列贝茨和瓦7.3.1节。
参考文献----------References----------
Nonlinear Regression Analysis and its Applications. Wiley, New York.
参见----------See Also----------
deriv3
deriv3
举例----------Examples----------
# The treated sample from the Puromycin data[从嘌呤霉素数据处理的样品]
mmcurve <- deriv3(~ Vm * conc/(K + conc), c("Vm", "K"),
function(Vm, K, conc) NULL)
Treated <- Puromycin[Puromycin$state == "treated", ]
(Purfit1 <- nls(rate ~ mmcurve(Vm, K, conc), data = Treated,
start = list(Vm=200, K=0.1)))
rms.curv(Purfit1)
##Parameter effects: c^theta x sqrt(F) = 0.2121[#参数的影响:C ^ THETA x SQRT(女)= 0.2121]
## Intrinsic: c^iota x sqrt(F) = 0.092[#本质:C ^丝毫x SQRT(女)= 0.092]
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注:
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