Discussion of Lectures 4

Xijia Liu

Department of Statistics, Umeå University

Lecture 4: Gaussian Discreminant Analysis

• Can you describe the basic idea of GDA to your families?
• Is GDA a linear classifier or non-linear classifier?
• Can we apply GDA to multiple class problems?
• What is the role of prior in GDA?
• Do you understand Fisher’s idea?
• Why only calculating the accuracy of a classifier is not sufficient?
• Do you know any other statistics for model evaluation for classification problem?