WOLFRAM

Wolfram 语言与系统参考资料中心

DispersionEstimatorFunction

广义线性模型拟合函数的一个选项，指定离差参数的估计量.

更多信息
Details and Options Details and Options
范例  
基本范例  
范围  
参见
相关指南
历史
按以下格式引用：

DispersionEstimatorFunction

DispersionEstimatorFunction

广义线性模型拟合函数的一个选项，指定离差参数的估计量.

更多信息

范例

打开所有单元 关闭所有单元

基本范例  (1)

拟合一个泊松模型：

Wolfram Language code: data = {{1, 1}, {2, 1}, {3, 4}, {5, 6}};
Wolfram Language code: m = GeneralizedLinearModelFit[data, x, x, ExponentialFamily -> "Poisson"]

用缺省的离差估计计算协方差矩阵：

Wolfram Language code: m["CovarianceMatrix"]

通过 Pearson 估计离差：

Wolfram Language code: m = GeneralizedLinearModelFit[data, x, x, ExponentialFamily -> "Poisson", DispersionEstimatorFunction -> "PearsonChiSquare"];m["CovarianceMatrix"]

通过均方误差估计离差得到：

Wolfram Language code: m = GeneralizedLinearModelFit[data, x, x, ExponentialFamily -> "Poisson", DispersionEstimatorFunction -> (Mean[(#1 - #2) ^ 2]&)];m["CovarianceMatrix"]

范围  (2)

定义 FittedModel 的估计：

Wolfram Language code: data = {{1, 1}, {2, 1}, {3, 4}, {5, 6}};
Wolfram Language code: m = GeneralizedLinearModelFit[data, x, x, ExponentialFamily -> "Poisson"]
Wolfram Language code: m["CovarianceMatrix"]
Wolfram Language code: m["CovarianceMatrix", DispersionEstimatorFunction -> (2&)]
Wolfram Language code: m["CovarianceMatrix", DispersionEstimatorFunction -> "PearsonChiSquare"]
Wolfram Language code: m["CovarianceMatrix", DispersionEstimatorFunction -> (Mean[(#1 - #2) ^ 2]&)]

拟合一个分对数模型：

Wolfram Language code: data = {{1, 0}, {1, 1}, {1, 1}, {2, 0}, {2, 0}, {2, 1}, {2, 1}, {2, 1}, {2, 1}};
Wolfram Language code: logit = LogitModelFit[data, x, x]

通过平方误差的和估计离差：

Wolfram Language code: logit["EstimatedDispersion", DispersionEstimatorFunction -> (Total[(#1 - #2) ^ 2]&)]

拟合一个概率模型：

Wolfram Language code: probit = ProbitModelFit[data, x, x]

通过均方误差估计离差：

Wolfram Language code: probit["EstimatedDispersion", DispersionEstimatorFunction -> (Mean[(#1 - #2) ^ 2]&)]
Wolfram Research (2008)，DispersionEstimatorFunction，Wolfram 语言函数，https://reference.wolfram.com/language/ref/DispersionEstimatorFunction.html.

文本

Wolfram Research (2008)，DispersionEstimatorFunction，Wolfram 语言函数，https://reference.wolfram.com/language/ref/DispersionEstimatorFunction.html.

CMS

Wolfram 语言. 2008. "DispersionEstimatorFunction." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/DispersionEstimatorFunction.html.

APA

Wolfram 语言. (2008). DispersionEstimatorFunction. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/DispersionEstimatorFunction.html 年

BibTeX

@misc{reference.wolfram_2026_dispersionestimatorfunction, author="Wolfram Research", title="{DispersionEstimatorFunction}", year="2008", howpublished="\url{https://reference.wolfram.com/language/ref/DispersionEstimatorFunction.html}", note=[Accessed: 08-September-2026]}

BibLaTeX

@online{reference.wolfram_2026_dispersionestimatorfunction, organization={Wolfram Research}, title={DispersionEstimatorFunction}, year={2008}, url={https://reference.wolfram.com/language/ref/DispersionEstimatorFunction.html}, note=[Accessed: 08-September-2026]}