R tidyr - pivot_wider() (Long to Wide)
Long-format data stores observations in rows where each row represents a single measurement. Wide-format data spreads these measurements across columns. pivot_wider() from the tidyr package…
Tidyr
R tidyr - replace_na() - Replace NA Values
The replace_na() function from tidyr provides a streamlined approach to handling missing data. It works with vectors, lists, and data frames, making it more versatile than base R’s is.na()…
R tidyr - separate() Column into Multiple
• The separate() function splits one column into multiple columns based on a delimiter, with automatic type conversion and flexible handling of edge cases through parameters like extra and fill
R tidyr - unite() Columns into One
The unite() function from the tidyr package merges multiple columns into one. The basic syntax requires the data frame, the name of the new column, and the columns to combine.
R tidyr - complete() - Fill in Missing Combinations
Implicit missing values are combinations of variables that don’t appear in your dataset but should exist based on the data’s structure. These are fundamentally different from explicit NA values that…
Read more →R tidyr - drop_na() - Remove Missing Values
The drop_na() function from tidyr provides a targeted approach to handling missing data in data frames. While base R’s na.omit() removes any row with at least one NA value across all columns,…
R tidyr - expand_grid() and crossing()
Both expand_grid() and crossing() create data frames containing all possible combinations of their input vectors. They’re essential for generating test scenarios, creating complete datasets for…
R tidyr - fill() - Fill Missing Values
The fill() function from tidyr addresses a common data cleaning challenge: missing values that should logically carry forward from previous observations. This occurs frequently in spreadsheet-style…
R tidyr - nest() and unnest()
List-columns are the foundation of tidyr’s nesting capabilities. Unlike typical data frame columns that contain atomic vectors (numeric, character, logical), list-columns contain lists where each…
Read more →R tidyr - pivot_longer() (Wide to Long)
• pivot_longer() transforms wide-format data into long format by converting column names into values of a new variable, essential for tidy data analysis and visualization in R