Switch Class of All Data Frame Columns to Appropriate Type in R (Example Code)

In this R tutorial you’ll learn how to convert all data frame columns to the appropriate data type.

Creation of Example Data

my_df <- data.frame(col1 = c("foo", "bar", "foo", "bar", "bar"),  # Constructing a data frame
                    col2 = c("3", "1", "6", "7", "3"),
                    col3 = c("3.1", "1.1", "6.1", "7.1", "3.1"))
my_df
#   col1 col2 col3
# 1  foo    3  3.1
# 2  bar    1  1.1
# 3  foo    6  6.1
# 4  bar    7  7.1
# 5  bar    3  3.1
sapply(my_df, class)                                              # Checking the column classes
#        col1        col2        col3 
# "character" "character" "character"

Example: Changing Classes of Data Frame Columns Automatically

my_df_updated <- type.convert(my_df, as.is = TRUE)                # Adjusting the column classes
sapply(my_df_updated, class)                                      # Checking the updated column classes
#        col1        col2        col3 
# "character"   "integer"   "numeric"

Further Resources & Related Articles

Have a look at the following R tutorials. They explain topics such as factors, dates, vectors, and naming data:

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