1. 首頁
  2. 問答
  3. 我的數據框中的這個變量有什麼問題？

我的數據框中的這個變量有什麼問題？

2014-04-29 29 views
0

我對我的數據框中的不同變量進行了一些分析，並針對相同的問題繼續運行：出於某種原因，我的$ MONTH_NAME變量中的月份是重複的（即，大多數情況下有兩個實例，即使不是全部，幾個月）。我無法弄清楚爲什麼，因爲表面上它們看起來都是一樣的。 有人可以告訴我什麼是錯的/如何解決它？我的數據框中的這個變量有什麼問題？

dput(combined.weather$MONTH_NAME) 
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16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 20L, 20L, 20L, 20L, 20L, 
20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 21L, 21L, 21L, 21L, 21L, 
21L, 21L, 19L, 19L, 19L, 19L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 
18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 
18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 
18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 18L, 23L, 22L, 22L, 22L, 
22L, 22L, 22L, 22L, 22L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 
15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 15L, 
15L, 17L, 17L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 
16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 
16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 
16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 
16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 16L, 
16L, 16L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 20L, 
20L, 21L, 21L, 21L, 21L, 21L, 21L, 21L, 21L, 21L, 21L, 21L, 21L, 
21L, 21L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 19L, 
19L, 19L, 19L, 18L, 18L, 14L, 14L, 14L, 14L, 11L), .Label = c("April ", 
"August ", "December ", "February ", "January ", "July  ", 
"June  ", "March ", "May  ", "November ", "September", 
"October ", "April", "August", "December", "February", "January", 
"July", "June", "March", "May", "November", "October"), class = "factor")

來源

2014-04-29 thebonafortuna

+1

但是你存儲了一些，如果不是全部兩次在你的數組中？順便說一句，在這裏檢查：http://mothereff.in/js-variables =>以數字開頭的變量名稱無效ECMAscript5 – Tyblitz

回答

3

你在你的水平有空格。

如何找出？

levels(combined.weather$MONTH_NAME)

應該給你這個輸出

[1] "April " "August " "December " "February " "January " "July " [7] "June  " "March " "May  " "November " "September" "October " [13] "April"  "August" "December" "February" "January" "July"  [19] "June"  "March"  "May"  "November" "October"

注意引號和個月的最後一個字母之間的空間。

所以讓我們使用gsub和正則表達式來修改它。

combined.weather$clean.month <-sub("\\s+$", "", combined.weather$MONTH_NAME)

之前，我重新如何刪除前導，尾隨和兩個，這裏是一個很好的答案 告訴你https://stackoverflow.com/a/2261149/2747709

怎麼有時它是值得看的控制檯上的輸出。 你也可以做table(combined.weather$MONTH_NAME)並仔細看看

來源

2014-04-29 18:24:12 infominer

+0

非常感謝你！替換#MONTH_NAME中的數據是否有意義，而不是創建一個名爲$ clean.month的新變量？ – thebonafortuna

+0

不要緊：我使用「combined.weather $ MONTH_NAME < - NULL」來刪除具有不良數據的舊變量。再次感謝！ – thebonafortuna

1

有兩個問題
1.你的對象是一個因素，而不是一個字符。你可以在dput的底部看到這個。
第一個點顯示在class=...部分中，第二個點顯示在.Label=...部分中。

簡單的解決方法：

# For (1) 
x <- as.character(x) 

# For (2) 
x <- gsub("^\\s*|\\s*$, "", x)

來源

2014-04-29 18:19:18

+0

謝謝@Ricardo Saporta。我可以「按原樣」運行命令，還是應該將MO​​NTH_NAME變量添加到某處？此外，是否有必要將其改爲人物？那有什麼好處？ – thebonafortuna

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