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Exploring table metadata

After creating the weather data table, the meteorological team needs to understand its structure before generating their reports. The team leader has asked you to provide information about the table's dimensions, columns, and a preview of the data.

The Table, DoubleColumn, and StringColumn classes from Tablesaw have been imported for you.

Este exercício faz parte do curso

Importing Data in Java

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Instruções do exercício

  • Print the table dimensions.
  • Display the column names.
  • Print the table structure.
  • Preview the first three rows.

Exercício interativo prático

Experimente este exercício completando este código de exemplo.

public class WeatherMetadataExample {
    public static void main(String[] args) {
        StringColumn days = StringColumn.create("Day", 
            "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday");
            
        DoubleColumn temperatures = DoubleColumn.create("Temperature", 
            22.5, 24.0, 23.2, 21.5, 20.8, 25.1, 26.3);
            
        DoubleColumn precipitation = DoubleColumn.create("Precipitation", 
            0.0, 2.5, 5.2, 0.0, 0.0, 1.3, 0.0);
        
        Table weatherData = Table.create("WeatherData")
            .addColumns(days, temperatures, precipitation);
        
        // Print the table dimensions
        System.out.println(____.____());
        
        // Display the column names
        System.out.println(____.____());
        
        // Print the table structure
        System.out.println(____.____());
        
        // Preview the first three rows
        System.out.println(____.____(____));

    }
}
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