ogistic Regression is a statistical method used for binary classification tasks, where the outcome variable is categorical and has two classes. Despite its name, it is used for classification rather than regression. The logistic regression algorithm models the probability that a given input belongs to a particular class. The logistic regression model applies the logistic…
In scikit-learn’s GridSearchCV (Grid Search Cross Validation), the parameter cv stands for “cross-validation.” It determines the cross-validation splitting strategy to be used when evaluating the performance of a machine learning model. When cv is set to an integer (e.g., cv=5), it represents the number of folds in a (Stratified) K-Fold cross-validation. For example, cv=5 means…
Now put the printed best_model here below and run:
Grid search is a tuning technique that attempts to compute the optimum values of hyperparameters. It is an exhaustive search that is performed on the specific parameter values of a model. The parameters of the estimator/model used to apply these methods are optimized by cross-validated grid-search over a parameter grid.
In general, the deeper you allow your tree to grow, the more complex your model will become because you will have more splits and it captures more information about the data and this is one of the root causes of overfitting. We can limit the tree with max_depth of tree:
In scikit-learn, the feature_importances_ attribute is associated with tree-based models, such as Decision Trees, Random Forests, and Gradient Boosted Trees. This attribute provides a way to assess the importance of each feature (or variable) in making predictions with the trained model. When you train a tree-based model, the algorithm makes decisions at each node based…
To visualize a decision tree in scikit-learn, you can use the plot_tree function from the sklearn.tree module. This function allows you to generate a visual representation of the decision tree. Here’s a simple example: To show the decision tree as text in scikit-learn, you can use the export_text function from the sklearn.tree module. This function…
For building a decision tree model in scikit-learn (sklearn), you need to import the relevant modules and classes. Here are the main components you’ll typically use:
he term “Receiver Operating Characteristic” (ROC) originated in the field of signal detection theory during World War II. Initially, it was used to analyze and measure the performance of radar receivers. The ROC curve, in Machine Learning, is a graphical representation that illustrates the trade-off between true positive rate (sensitivity) and false positive rate (1…
uppose we have a binary classification problem in which we have to predict two classes: 1 and 0. A machine learning model tends to make some mistakes by incorrectly classifying data points, resulting in a difference between the actual and predicted class of the data point. Four possible scenarios that can happen are: Clearly, we want…
