Final answer:
The objective function of LDF is to minimize within-class scatter and maximize between-class scatter.
Step-by-step explanation:
The objective function of Linear Discriminant Function (LDF) is a mathematical representation used to classify data into distinct classes. The objective function is to minimize the within-class scatter while maximizing the between-class scatter. It is commonly used in pattern recognition and machine learning algorithms such as Fisher's Linear Discriminant Analysis (LDA).