疏通函数错误-R包MuMln [英] dredge function error - R package MuMln

问题描述

我必须对数据集进行统计分析.我想创建所有可能的模型并使用挖泥功能测试它们，但它不起作用.事实上，当我输入:

I have to do statistical analyses on a data set. I would like to create all the possible models and to test them with the dredge function but it doesn't work. Indeed, when I type:

glm1<-glm(presabs~dca1+dca2+se1+se2, family=binomial(logit))
dredge(glm1)

我收到此错误:

Erreur in dredge(glm1) : 
'global.model''s 'na.action' argument is not set and options('na.action') is "na.omit"

有人可以帮我吗?

推荐答案

使用 options(na.action = "na.fail") 的问题是它改变了 R 的全局设置. 如果您有一个大型脚本，更改全局设置可能会影响您隐式依赖 R 的默认设置的代码的其他部分.有两种方法可以避免这种情况:

The issue with using options(na.action = "na.fail") is that it changes the global settings of R. If you have a large script, changing the global settings will potentially impact on other sections of your code where you implicitly rely on R's default settings. There are two ways to avoid this:

1. 使用 dredge 后，通过 options(na.action = "na.omit") 更改设置.

1. After using dredge change the settings back via options(na.action = "na.omit").

或者更好的方法...

1. 利用回归函数设置na.action 参数的能力.在您的情况下:

1. Utilise the regression function's ability to set the na.action argument. In your case:

glm1 <- glm(presabs ~ dca1+dca2+se1+se2,
            family=binomial(logit),
            na.action = "na.fail")

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