Conteúdo do Curso
Recognizing Handwritten Digits
KNN
The K-Nearest Neighbors (KNN) algorithm, a supervised machine learning technique, is predominantly utilized for classification. This algorithm operates by classifying a new data point according to the categories of its closest neighbors within the training dataset.
In the context of classification, the KNN classifier designates a class to a new data point by identifying the 'k' nearest neighbors in the training set, with 'k' being a user-defined parameter. The classification of the new data point is then determined by a majority vote among these 'k' nearest neighbors.
Despite its simplicity and adaptability, the KNN algorithm is computationally intensive for extensive datasets. It necessitates a meticulous selection of both the 'k' value and the distance metric. Nonetheless, KNN remains a widely employed and effective tool for classification tasks in the realm of machine learning.
Swipe to show code editor
-
Initialize a K-Nearest Neighbors classifier with
4neighbors. -
Train the classifier with the training data and the corresponding labels.
-
Predict classes for the test set using the trained classifier.
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The K-Nearest Neighbors (KNN) algorithm, a supervised machine learning technique, is predominantly utilized for classification. This algorithm operates by classifying a new data point according to the categories of its closest neighbors within the training dataset.
In the context of classification, the KNN classifier designates a class to a new data point by identifying the 'k' nearest neighbors in the training set, with 'k' being a user-defined parameter. The classification of the new data point is then determined by a majority vote among these 'k' nearest neighbors.
Despite its simplicity and adaptability, the KNN algorithm is computationally intensive for extensive datasets. It necessitates a meticulous selection of both the 'k' value and the distance metric. Nonetheless, KNN remains a widely employed and effective tool for classification tasks in the realm of machine learning.
Swipe to show code editor
-
Initialize a K-Nearest Neighbors classifier with
4neighbors. -
Train the classifier with the training data and the corresponding labels.
-
Predict classes for the test set using the trained classifier.
Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo