3
最大的不同在R I具有下列R-代碼:使用命令
library(ggplot2)
data(diamonds)
by(diamonds$price, diamonds$cut, summary)
by(diamonds$price, diamonds$cut, max)
這給了我:
diamonds$cut: Fair
Min. 1st Qu. Median Mean 3rd Qu. Max.
337 2050 3282 4359 5206 18570
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diamonds$cut: Good
Min. 1st Qu. Median Mean 3rd Qu. Max.
327 1145 3050 3929 5028 18790
----------------------------------------------
diamonds$cut: Very Good
Min. 1st Qu. Median Mean 3rd Qu. Max.
336 912 2648 3982 5373 18820
----------------------------------------------
diamonds$cut: Premium
Min. 1st Qu. Median Mean 3rd Qu. Max.
326 1046 3185 4584 6296 18820
----------------------------------------------
diamonds$cut: Ideal
Min. 1st Qu. Median Mean 3rd Qu. Max.
326 878 1810 3458 4678 18810
diamonds$cut: Fair
[1] 18574
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diamonds$cut: Good
[1] 18788
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diamonds$cut: Very Good
[1] 18818
----------------------------------------------
diamonds$cut: Premium
[1] 18823
----------------------------------------------
diamonds$cut: Ideal
[1] 18806
我不明白爲什麼這兩個表中的最大值不同。最大值不應該一樣嗎?
'位數= 5'將在這裏就夠了。 – mtoto
我發現第一行「by(diamonds $ price,diamonds $ cut,summary)」的行爲非常奇怪。這條線如何計算每種情況下的最大值? – Ohumeronen