錯誤GGally - 確保你的「列」的值都小於5

Question

我試圖使用GGally包

> library(GGally) 
> ggpairs(iris, columns=c("Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width"), colour='Species', lower=list(continuous='points'), axisLabels='none', upper=list(continuous='blank')) 
Error in ggpairs(iris, columns = c("Sepal.Length", "Sepal.Width", "Petal.Length", : 
    Make sure your 'columns' values are less than 5. 
    columns = c(Sepal.Length, Sepal.Width, Petal.Length, Petal.Width) 

繪製虹膜數據集爲什麼抱怨列值的數量。它不能用於超過5列嗎？

我也想運行K-均值，然後將結果與實際比較，但這也給出了類似的錯誤：

> set.seed(1234) 
> iris$Cluster <- factor(kmeans(iris[,c("Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width")], centers=length(levels(iris$Species)))$cluster) 
> ggpairs(iris, columns=c("Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width"), colour='Cluster', lower=list(continuous='points'), axisLabels='none', upper=list(continuous='blank')) 
Error in ggpairs(iris, columns = c("Sepal.Length", "Sepal.Width", "Petal.Length", : 
    Make sure your 'columns' values are less than 6. 
    columns = c(Sepal.Length, Sepal.Width, Petal.Length, Petal.Width) 

Answer 1

錯誤在於列參數，它必須是索引的矢量即：

#notice the columns argument is a vector of indices 
library(GGally) 
ggpairs(iris, columns=1:4, 
     colour='Species', lower=list(continuous='points'), 
     axisLabels='none', 
     upper=list(continuous='blank')) 

輸出：

和kmeans情節完全一樣：

set.seed(1234) 
iris$Cluster <- factor(kmeans(iris[,c("Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width")], centers=length(levels(iris$Species)))$cluster) 
ggpairs(iris, columns=1:4, colour='Cluster', lower=list(continuous='points'), axisLabels='none', upper=list(continuous='blank'))