Difference Between Parameters and Hyperparameters


Parameters and hyperparameters are two concepts used often but with different connotations in the field of machine learning. For creating and improving machine learning models, it is crucial to comprehend the distinctions between these two ideas. In this blog article, we will describe parameters and hyperparameters, how they vary, and how they are utilized in machine learning models.

What are the Parameters?

Parameters in machine learning are the variables that the model learns while being trained. Based on the input data, the model's predictions are affected by these factors. To put it another way, parameters are the model coefficients that are changed during training to fit the data. The intercept and slope coefficients are two examples of parameters in a linear regression model.

What are Hyperparameters?

While the variables that are established before the model's training are known as hyperparameters. The way the model learns the parameters is influenced by these factors, as is the behavior of the training method. In other words, hyperparameters are the knobs we can turn to modify the behavior of the model. The regularization strength and learning rate are two instances of hyperparameters in a linear regression model.

Differences Between Parameters and Hyperparameters

Parameters

Hyperparameters

Observed by the model during training

The model should be ready before training.

Find out how the model uses the input data to produce predictions.

The behavior of the training algorithm should be established.

A linear regression model's slope and intercept coefficients serve as examples.

The learning rate and regularization power of a linear regression model are two examples.

Throughout training should be improved to match the data

In order to maximize performance, a model's parameters are adjusted before training.

The objective is to determine these variables' ideal values.

The goal is to identify the best values for these variables in order to maximize model performance.

The important distinctions between parameters and hyperparameters, such as time, scope, and setting optimization, are shown in the table.

How are Parameters and Hyperparameters Used in Machine Learning Models?

Parameters and hyperparameters are used to train and improve machine learning models. The following machine learning models frequently show the following behavior when employing parameters and hyperparameters −

  • Set the hyperparameters  Before training the model, the hyperparameters are initially set to certain values. These values can be chosen via trial and error, experience from the past, or intuition.

  • Train the model  The model performs parameter modifications depending on the input data during the training phase to decrease the error between the predicted output and the actual result.

  • Optimize the hyperparameters  When the model has been trained, its effectiveness can be enhanced by modifying the hyperparameters. Typically, to do this, a validation set is used to run the model while adjusting the hyperparameters until the model is successful.

  • Test the model  The performance of the model is then evaluated using a test set. This is achieved using both the learned parameters and the improved hyperparameters.

Conclusion

In conclusion, parameters, and hyperparameters are two crucial ideas in machine learning that serve various but equally significant functions. The model learns parameters during training that govern how it generates predictions based on incoming data. Before the model is trained, hyperparameters are established, and they control how the training algorithm behaves. These factors are combined to train and improve machine learning models. You can better develop and tune your machine learning models to get better performance by knowing the difference between parameters and hyperparameters.

Updated on: 25-Apr-2023

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