Importing selected columns
It's time to practice importing only a few columns from a file as opposed to importing the entire file. You will be importing the following file:
id,name,val
29192,Robert Whitaker, 200
49301 ,Elisa Waters,190
34456 , Karla Schmidt,458
Questo esercizio fa parte del corso
Data Manipulation with data.table in R
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
# Select "id" and "val" columns
select_columns <- fread("sample.csv", ___)
select_columns