Transforming text data
You notice product names in your grocery inventory database have inconsistent formats. Some have parentheses like "Apple (Organic)", extra spaces, and mixed capitalization. This makes it hard to match and analyze products accurately. Standardize these names by removing parenthetical descriptions, cleaning up surrounding spaces, and converting to lowercase.
This exercise is part of the course
Cleaning Data in Java
Exercise instructions
- Map product
namesthrough cleaning operations. - Remove parentheses from each name.
- Remove surrounding space from each name.
- Convert each name to lowercase.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
import tech.tablesaw.api.StringColumn;
import tech.tablesaw.api.Table;
public class GroceryDataTransformation {
public static void main(String[] args) {
Table inventory = Table.read().csv("grocery_inventory.csv");
StringColumn names = inventory.stringColumn("Product_Name");
StringColumn standardizedNames =
// Map product names through cleaning operations
____.____(
// Remove parentheses
t -> t.____("\\(.*\\)", "")
// Remove surrounding space
.____()
// Convert to lowercase
.____())
.setName("Standardized_Names");
System.out.println("Example name before cleaning: " + names.get(84));
System.out.println("Example name after cleaning: " + standardizedNames.get(84));
}
}