Parametric and Non-Parametric Models

In this article, we will learn the basic difference between Parametric and Non-Parametric Models

Parametric Models

• It represents the relation between input and output by means of equations.
• It contains the finite number of explicit parameters.
• Model coefficients are not known exactly.
• White box models are the parametric models.
• For example: differential equations in mathematical model.

Non-Parametric Models

• It represents the relation between input and output by means of a table or curve.
• It does not exhibit a certain structure.
• Model coefficients are more precise for the given system within operating limits.
• It has infinite dimensions.
• Black box models are the non-parametric models.
• For example: impulse response,  step response, frequency response, etc.