# How to classify “wine” using SKLEARN LDA and QDA models – Multiclass Classification in Python

In machine learning, the task of classifying wine is known as multiclass classification, as there are multiple classes (or types) of wine that need to be identified. One popular approach to multiclass classification is to use Linear Discriminant Analysis (LDA) and Quadratic Discriminant Analysis (QDA) models.

LDA and QDA are both types of discriminant analysis, which are methods for finding a linear combination of features that separates the different classes in your data. However, the difference between them is that LDA assumes that the data within each class follows a Gaussian distribution with the same covariance matrix, while QDA does not make this assumption. In practice, LDA tends to work well when the assumption of a common covariance matrix is reasonable, while QDA is more flexible but may be more prone to overfitting.

In Python, the scikit-learn library (also known as sklearn) provides both LinearDiscriminantAnalysis (LDA) and QuadraticDiscriminantAnalysis (QDA) classifier models. To use these models, you’ll first need to import the necessary library, and then you can create an instance of the classifier and fit it to your data.

It’s important to note that, LDA is a linear classifier, LDA finds a linear combination of features which separate different classes. Meanwhile QDA is quadratic classifier, that’s why it’s more flexible than LDA, but also may be more prone to overfitting.

In summary, LDA and QDA are both popular approaches for multiclass classification problems such as classifying wines, the scikit-learn library provides implementation of these classifiers, LinearDiscriminantAnalysis (LDA) and QuadraticDiscriminantAnalysis (QDA) which can be easily implemented and used to train models and make predictions, but it’s important to note that LDA is a linear classifier, while QDA is quadratic classifier and it’s more flexible than LDA but also may be more prone to overfitting.

In this Machine Learning Recipe, you will learn: How to classify “wine” using SKLEARN LDA and QDA models – Multiclass Classification in Python.

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