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# What are the two types of classification algorithms? Classification is the act of identifying, comprehending, and arranging concepts and things into predetermined groups or “subpopulations”. Machine Learning systems utilize a wide range of methods to classify new datasets based on the categories already assigned to the training datasets.

In Machine Learning, classification algorithms take in training data and use it to make predictions about whether or not new data will fit into one of many predefined categories. One of the most prominent applications of categorization is separating emails into “spam” and “non-spam” categories.

Classification is a kind of pattern recognition in which binary classification algorithms are used to train data to identify the same pattern (similar phrases or attitudes, numerical sequences, etc.) in future data sets.

The study of classification in statistics is extensive and there are multiple class classification techniques available based on the dataset being analyzed. Here are the five most prevalent Machine Learning algorithms:

Logistic Regression

Using a formula called logistic regression, one may foretell whether or not a certain event will take place. This information may be shown as Yes/No.

It computes the likelihood of the dependent variable Y given the independent variable X.

This may be used to determine the likelihood that a given word has a good or negative meaning (0, 1, or on a scale between), or it may be used to identify the item in a photograph by assigning each object a likelihood between 0 and 1.

Decision Tree

A supervised learning method that excels at classifying data is the decision tree, which can also precisely rank different classes. It functions as a flowchart, sorting data points into two comparable categories at a time, from “tree stem” through “branches” to “leaves,” where the categories grow more closely related. This results in categories inside, allowing organic categorization with little human oversight.

Naive Bayes

Naive Bayes estimates the probability of whether or not a piece of data belongs to a certain category. It may be used in text analysis to classify words or sentences as relating to a predetermined “tag” (category) or not.

K-nearest Neighbors

K-nearest Neighbors (k-NN) is a method that trains datasets to identify the k closest neighbors in future samples.

When k-NN is used for Machine Learning multiclass classification, data is assigned to the group of its closest neighbor based on a calculation. If k equals 1, then it is put in the class closest to 1. The multi-label classification of K is based on a plurality of its neighbors.

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