从数据集中移除定性要素

Question

我有一个由定量和定性特征组成的数据集。如何从R中的这个数据集中删除定性特征(例如："Auto“dataset)？

Answer 1

下面标识每列的类型，然后从数据帧中删除任何不需要的数据类型

library(ISLR)

data <- Auto

# Get Data Types of all Columns in the Data Frame
column_types <- sapply(data, class)

# Create a vector to hold all the unwanted data types (Change to what you want)
unwanted_types <- c("factor", "character")

# Remove all the columns which are of the unwanted datatypes
data <- data[, which(!column_types %in% unwanted_types)]

# Get Summary of the DataFrame
summary(data)

mpg          cylinders      displacement     horsepower        weight      acceleration        year           origin     
 Min.   : 9.00   Min.   :3.000   Min.   : 68.0   Min.   : 46.0   Min.   :1613   Min.   : 8.00   Min.   :70.00   Min.   :1.000  
 1st Qu.:17.00   1st Qu.:4.000   1st Qu.:105.0   1st Qu.: 75.0   1st Qu.:2225   1st Qu.:13.78   1st Qu.:73.00   1st Qu.:1.000  
 Median :22.75   Median :4.000   Median :151.0   Median : 93.5   Median :2804   Median :15.50   Median :76.00   Median :1.000  
 Mean   :23.45   Mean   :5.472   Mean   :194.4   Mean   :104.5   Mean   :2978   Mean   :15.54   Mean   :75.98   Mean   :1.577  
 3rd Qu.:29.00   3rd Qu.:8.000   3rd Qu.:275.8   3rd Qu.:126.0   3rd Qu.:3615   3rd Qu.:17.02   3rd Qu.:79.00   3rd Qu.:2.000  
 Max.   :46.60   Max.   :8.000   Max.   :455.0   Max.   :230.0   Max.   :5140   Max.   :24.80   Max.   :82.00   Max.   :3.000 

我还建议阅读R使用的所有不同数据类型。