Snippets
Replace missing numeric values with true NAs in a column of a data frame - Snippet #92
Discover how to replace missing numeric values with true NAs in a column of a data frame with R
Package: dplyr
Snippets
Store a modified column in a new column in a data frame – Snippet #91
Discover how to store a modified column in a new column in a data frame with R
Snippets
Get rows that have the minimum or maximum values in a column – Snippet #86
Discover how to get rows that have the minimum or maximum values in a column with R
Snippets
Get first and last rows of a data frame – Snippet #85
Discover how to get first and last rows of a data frame with R
Snippets
Get a random sample of rows from a data frame – Snippet #84
Discover how to get a random sample of rows from a data frame with R
Snippets
Filter a column if it contains a certain character string – Snippet #14
Discover how to filter a column if it contains a certain character string with R
Snippets
Replace missing character strings with true NAs in a column of a data frame – Snippet #12
Discover how to replace missing character strings with true NAs in a column of a data frame with R
Snippets
Replace a character string in a column of a data frame – Snippet #11
Discover how to replace a character string in a column of a data frame with R
Snippets
Delete characters in a column of a data frame – Snippet #10
Discover how to delete characters in a column of a data frame with R
Snippets
Remove or keep columns in a data frame – Snippet #6
Discover how to remove or keep columns in a data frame with R
Snippets
Get unique values in a column – Snippet #5
Discover how to get unique values in a column with R
Snippets
Filter a data frame based on the values in a column – Snippet #4
Discover how to filter a data frame based on the values in a column with R