Some of your attributes are strings (known as nominals) and linear regression works with numbers alone. As the error message suggests, use an operator to change nominals to numeric - in fact there is one called "Nominal to Numeric" that could be used.
Some of your attributes are strings (known as nominals) and linear regression works with numbers alone. As the error message suggests, use an operator to change nominals to numeric - in fact there is one called "Nominal to Numeric" that could be used.
