我试图从regsubsets获取重要性的变量(列名)。我喜欢逐个获取我可以分析的重要变量。这是程序
library(leaps)
library(ISLR)
data(Hitters)
reg_fit=regsubsets(Salary~., data = Hitters, nvmax = 10, method = "forward")
问题是reg_fit中的列名与data-Hitters中的列名不同。
以下是原始数据的输出:
names(Hitters)
## [1] "AtBat" "Hits" "HmRun" "Runs" "RBI"
## [6] "Walks" "Years" "CAtBat" "CHits" "CHmRun"
## [11] "CRuns" "CRBI" "CWalks" "League" "Division"
## [16] "PutOuts" "Assists" "Errors" "Salary" "NewLeague"
以下是从reg_fit中提取的输出:
colnames(summary(reg_fit)$which)
## [1] "(Intercept)" "AtBat" "Hits" "HmRun" "Runs"
## [6] "RBI" "Walks" "Years" "CAtBat" "CHits"
## [11] "CHmRun" "CRuns" "CRBI" "CWalks" "LeagueN"
## [16] "DivisionW" "PutOuts" "Assists" "Errors" "NewLeagueN"
注意Legaue更改为LeagueN,Division更改为DivisionW。任何想法,如果这是一个错误或有一个简单的方法从reg_fit获取列名?
答案 0 :(得分:1)
这不是一个错误。它将分类变量分解为指标变量,以便它们可以用于回归,名称更改是如何让您知道哪个级别分配给指标的正级别。
如果您想避免这种情况,可以通过预处理来实现。以下是变量Button clickButton = (Button) findViewById(R.id.btn1);
if (clickButton != null) {
clickButton.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
/***Do what you want with the click here***/
}
});
}
的示例:
League
在上面的示例中,我创建了一个数字变量,当League <- rep(0,322)
League[Hitters$League == "N"] <- 1
Hitters$League <- as.numeric(as.character(League))
reg_fit=regsubsets(Salary~., data = Hitters, nvmax = 10, method = "forward")
colnames(summary(reg_fit)$which)
等于League
时,它等于1,并用它来替换{{1}}的{{1}}变量版本。< / p>
对于二元因子变量,您可以在运行回归后更改结果对象中的标签,但是如果您有超过2个级别,则无效。对于多类因子变量,您需要在原始数据集中创建多个指标变量,就像我在上面的示例中所做的那样。