Writing files to disk

fwrite() is a parallel file writer, and like fread(), it also has intelligent defaults.

For example, print dt in your console and notice that the column name has the first and last names separated with a , and the column val is of type list. fwrite() can automatically quote name column and add a secondary separator (the symbol for OR operator, |) for the list column.

Cet exercice fait partie du cours

Data Manipulation with data.table in R

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Instructions

Write dt to disk using the file name "fwrite.txt".
Import the file using readLines() to verify that the name column is quoted automatically and the list column is separated with |.
Import the file using fread().

Exercice interactif pratique

Essayez cet exercice en complétant cet exemple de code.

# Write dt to fwrite.txt
___(___, "___")

# Import the file using readLines()
___("fwrite.txt")

# Import the file using fread()
___("fwrite.txt")

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