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choose-optimal-threshold-for-imbalanced-dataset icon choose-optimal-threshold-for-imbalanced-dataset

ROC curve for finding the optimal threshold: A receiver operating characteristics or known as ROC curve is a two-dimensional plot that illustrates how well a classifier system works as the discrimination cut-off value is changed over the range of the predictor variable. The X-axis or independent variable is the false positive rate for the predictive test. The Y-axis or dependent variable is the true positive rate for the predictive test. It is relevant to note that the nearer to the upper-left side of ROC space, the better a classifier is.

cs229-python icon cs229-python

Exercises and solutions to Stanford CS229 Machine Learning in Python

ml-from-scratch icon ml-from-scratch

Machine Learning From Scratch. Bare bones NumPy implementations of machine learning models and algorithms with a focus on accessibility. Aims to cover everything from linear regression to deep learning.

pca icon pca

Here is a detailed explanation of PCA technique which is used for dimesnionality reduction using sklearn and python

post_pruning_decisiontree icon post_pruning_decisiontree

DecisionTreeClassifier provides parameters such as min_samples_leaf and max_depth to prevent a tree from overfiting. Cost complexity pruning provides another option to control the size of a tree. In DecisionTreeClassifier, this pruning technique is parameterized by the cost complexity parameter, ccp_alpha. Greater values of ccp_alpha increase the number of nodes pruned. Here we only show the effect of ccp_alpha on regularizing the trees and how to choose a ccp_alpha based on validation scores.

python icon python

All Algorithms implemented in Python

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