Question

我是初学者，使用R studio进行入门计量经济学课程。我正在使用包含面板数据的Ecdat数据集，我想进行多元回归，然后对个人和时间使用固定效果。每当我尝试使用plm包的固定效果函数时，我都会收到以下错误消息：

Error in `row.names<-.data.frame`(`*tmp*`, value = c("X1.2", "X1.3", "X1.4",  : 
  duplicate 'row.names' are not allowed
In addition: Warning message:
non-unique values when setting 'row.names': 
‘X1’, ‘X1.1’, ‘X1.2’, ‘X1.3’, ‘X1.4’, ‘X1.5’, ‘X1.6’, 
‘X2’, ‘X2.1’, ‘X2.2’, ‘X2.3’, ‘X2.4’, ‘X2.5’, ‘X2.6’, 
‘X3’, ‘X3.1’, ‘X3.2’, ‘X3.3’, ‘X3.4’, ‘X3.5’, ‘X3.6’, 
‘X4’, ‘X4.1’, ‘X4.2’, ‘X4.3’, ‘X4.4’, ‘X4.5’, ‘X4.6’, 
‘X5’, ‘X5.1’, ‘X5.2’, ‘X5.3’, ‘X5.4’, ‘X5.5’, ‘X5.6’, 
‘X6’, ‘X6.1’, ‘X6.2’, ‘X6.3’, ‘X6.4’, ‘X6.5’, ‘X6.6’, 
‘X7’, ‘X7.1’, ‘X7.2’, ‘X7.3’, ‘X7.4’, ‘X7.5’, ‘X7.6’, ‘X8’

我在不同的论坛上环顾四周试图找到一种方法，在设置行的名称时使值唯一，但到目前为止我还没有取得任何成功。这是我到目前为止所做的：

#in order to get the id and time for the data from Ecdat
Wages <- plm.data(Wages, index = 595) 

#in order to try to make the row names unique
rownames(Wages) <- make.names(Wages[,1], unique = TRUE)

我还创造了以下假人：

allwage <- Wages$lwage    
skin <- Wages$black    
edu <- Wages$ed    
years <- Wages$exp

然后我尝试在以下回归中使用固定效果：

theFEline <- plm(allwage ~ skin, + edu + years, data = Wages, 
                 index = c("id","time"), model="within")

那是我收到错误消息的时候。

我对我正在做的事情的想法非常有限，甚至不知道下一步该做什么。任何帮助都将非常感激。

的Björn

Answer 1

希望这有帮助！

extension UIImage {

    func outline() -> UIImage? {

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        let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
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        let context = UIGraphicsGetCurrentContext()
        context?.setStrokeColor(red: 1.0, green: 0.5, blue: 1.0, alpha: 1.0)
        context?.setLineWidth(5.0)
        context?.stroke(rect)
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return newImage

    }

}

错误：设置row.names时的非唯一值

1 个答案: