# What Is Classification and Regression in Machine Learning?

Machine learning is divided into types: supervised and unsupervised machine learning. In supervised machine learning, inputs and outputs are offered. To aid judgment in future, it offers several algorithms of fixed quantities. Supervised machine learning algorithms have come up with applications like chatbots, facial expression system, etc.

Both classification and regression fall into the category of supervised learning. So what are they and why is it necessary to understand them?

# Classification

If your dataset requires you to work with discrete values, then you should use classification. When the solution to a problem demands a definite or predetermined range of output, then you most probably have to deal with classification. The following scenarios are one of the few examples where classification is used.

• To determine consumer demographics.
• To predict the likelihood of a loan.
• To check who wins or lose a coin toss.

When a problem can have only two answers (yes or no), then such a classification falls under the category binary classification.

On the other hand, multi-label classification processes several variables. This type of classification comes handy in the above-mentioned consumer segmentation, grouping images, and text and audio analysis. For instance, a sports blog can have posted about multiple sports like basketball, baseball, tennis, football, and others, at the same time.

There is also the multi-class classification in which a target defines a sample. For example, it is possible for a fruit to be apple or banana but it cannot become both at the same time.

Classification computes only those values which are “observed”. It relies on the total of its input to compute forecasting which offers more than a single result. The algorithm which maps a provided input into a specific category is referred to as the classifier. The feature is a measurable variable.

Before the creation of a classification model, firstly you have to pick a classifier and have it initialized. Subsequently, you have to provide some training to that classifier. In the end, you can check the output for the observed x values to predict the label y.

# Regression

Regression works opposite to classification; it is used for the prediction of results where continuous values are at play. In regression, the variables are flexible and can be modified, unlike classification hence; there is no need to restrict to a fixed set of labels.

Linear regression is one of the leading algorithms. Sometimes, linear regression is underestimated as some perceive its working to be too easy. However, in actuality, linear regression can be used in multiple cases, as it is quite simple in comparison to others. You can use logistic regression to estimate the prices of property, assess the churn rate of customers, and even manage the collection of money from that person.

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