MullOverThings

Useful tips for everyday

# What is a tuning parameter?

## What is a tuning parameter?

A tuning parameter (λ), sometimes called a penalty parameter, controls the strength of the penalty term in ridge regression and lasso regression. It is basically the amount of shrinkage, where data values are shrunk towards a central point, like the mean.

## What does Hyper parameter tuning do?

In machine learning, hyperparameter optimization or tuning is the problem of choosing a set of optimal hyperparameters for a learning algorithm. These measures are called hyperparameters, and have to be tuned so that the model can optimally solve the machine learning problem.

## How do I tune a Catboost model?

Steps taken in hyperparameter tuning

1. Define a model.
2. Define the range of possible values for all hyperparameters.
3. Define a method for sampling hyperparameter values.
4. Define evaluative criteria to judge the model.
5. Define a cross-validation method.

## Is CatBoost better than XGBoost?

As of CatBoost version 0.6, a trained CatBoost tree can predict extraordinarily faster than either XGBoost or LightGBM. On the flip side, some of CatBoost’s internal identification of categorical data slows its training time significantly in comparison to XGBoost, but it is still reported much faster than XGBoost.

## How do I tune my LightGBM parameters?

According to lightGBM documentation, when facing overfitting you may want to do the following parameter tuning:

1. Use small max_bin.
2. Use small num_leaves.
3. Use min_data_in_leaf and min_sum_hessian_in_leaf.
4. Use bagging by set bagging_fraction and bagging_freq.
5. Use feature sub-sampling by set feature_fraction.

## What does tuning mean?

tuned; tuning. Definition of tune (Entry 2 of 2) transitive verb. 1 : to adjust in musical pitch or cause to be in tune tuned her guitar. 2a : to bring into harmony : attune.

## Which is the best description of hyperparameter tuning?

Hyperparameter tuning, also called hyperparameter optimization, is the process of finding the configuration of hyperparameters that results in the best performance. The process is typically computationally expensive and manual.

## How to control resource budget with hyperparameter tuning?

Control your resource budget by specifying the maximum number of training runs. max_total_runs: Maximum number of training runs. Must be an integer between 1 and 1000. max_duration_minutes: (optional) Maximum duration, in minutes, of the hyperparameter tuning experiment. Runs after this duration are canceled.

## When does the hyperparameter tuning experiment end in azure?

If both max_total_runs and max_duration_minutes are specified, the hyperparameter tuning experiment terminates when the first of these two thresholds is reached. Additionally, specify the maximum number of training runs to run concurrently during your hyperparameter tuning search.

## How is a hyperparameter used in machine learning?

Hyperparameters are adjustable parameters you choose to train a model that govern the training process itself. For example, to train a deep neural network, you decide the number of hidden layers in the network and the number of nodes in each layer prior to training the model. These values usually stay constant during the training process.