A model parameter is a configuration that is internal to the model and whose value can be estimated from the given data. They are an essential part of the model structure as they help in predicting future outcomes and are key to the model’s training process. The values of these parameters are often learned from the data and are used to adjust the model’s behavior, representing the underlying distribution of the data the model is learning from.
For example, in a linear regression model, the parameters are the slope and the y-intercept. The model uses these parameters to determine the best fit line that predicts the outcome variable based on the input features. Similarly, in a neural network, the weights and biases are considered as the parameters of the model. The process of learning in neural networks consists of adjustments of these weights and biases based on the outcome of their predictions.
These parameters are learned during the training of the model, where the model iteratively adjusts them to minimize the loss function, which measures the difference between the model’s predictions and the actual data. Once the model is trained, the tuned parameters enable the model to make predictions on new, unseen data. A well-tuned set of parameters is crucial for the robust performance of a machine learning model. However, it’s worth noting that too many parameters can lead to overfitting, a scenario where the model learns the training data too well, often at the expense of its performance on new data.« Back to Glossary Index