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What is Machine Learning? Definition and Types.

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What is Machine Learning? Definition & Types.

Machine learning allows computers to function autonomously, without the need for programming. ML applications can be fed with new data and can learn, grow, adapt, and develop independently.

Machine learning is a process that draws insight from large amounts of data. It uses algorithms to find patterns and then learns in an iterative manner. ML algorithms use computation methods to learn from data, rather than relying on any model or predetermined equation.

Machine learning is essential to solve problems in many areas today, thanks to the IoT, big data and ubiquitous computing.

  • Computational finance (credit scoring and algorithmic trading).
  • Computer vision (facial recognition, motion tracking, object detection)
  • Computational biology (DNA sequencing and brain tumor detection, drug discovery, etc.)
  • Predictive maintenance (automotive, aerospace, and manufacturing)
  • Natural language processing (voice recognition).

What is machine learning?

How does machine learning work

To create a model, machine learning algorithms are trained on a training dataset. The model is used to predict the future as new data is added to the ML algorithm.

The prediction accuracy is also checked. The accuracy of the ML algorithm is evaluated and the algorithm is then either deployed or repeatedly trained with an augmented dataset to achieve the desired accuracy.

Different types of machine learning

There are many ways to train machine learning algorithms, each with its own pros and cons. These learning methods and learning styles can be used to classify machine learning into four types.

different types of machine leaning

1. Machine learning supervised

This type of machine learning (ML) involves supervision. Machines are trained using labeled data and then able to predict outputs using the training. A labeled dataset indicates that certain input and output parameters have been mapped. The input and output parameters are mapped to the machine. The test data is used to train the device so that it can predict the outcome.

The primary purpose of the supervised-learning technique is to map the input variables (a) and output variables (b). The two main categories of supervised machine learning are:

  • Classification These algorithms address classification problems that have a categorical output variable. This category is used in email filtering and spam detection.

There are several classification algorithms that have been used in the past, including the Decision Tree Algorithm and Logistic Regression Algorithms, Random Forest Algorithm and Support Vector Machine Algorithm.

  • Regression: Regression algorithms are used to solve regression problems where inputs and outputs have a linear relationship. These algorithms are capable of predicting continuous output variables. These include market trends analysis, weather prediction, and so on.

2. Unsupervised machine learning

Unsupervised learning is a method of learning that doesn’t require supervision. The machine is trained with an unlabeled dataset, and can predict the output without supervision. Unsupervised learning algorithms aim to group the unsorted dataset according to the similarities, differences and patterns.

Consider, for example, an input dataset that includes images of fruit-filled containers. The machine learning model does not have access to these images. The ML model uses the data to classify the images. It then identifies the patterns of objects in the input images. After categorizing the input images, the machine predicts the output and tests it with a test dataset.

There are two types of unsupervised machine learning:

  • Clustering – The clustering technique is the process of grouping objects based on similarities and differences. You could group customers based on the products they have purchased.

There are several clustering algorithms that have been used in the past, including the K-Means Clustering Algorithm and Mean-Shift Algorithms, DBSCAN Algorithms, Principal Component Analysis and Independent Component Analysis.

  • Association Learning:Association learning is the identification of typical relationships between variables in a large data set. It helps to determine the dependencies of data items and map associated variables. It is used for market data analysis and web usage mining.

The Apriori Algorithm and Eclat Algorithm are popular algorithms that follow association rules.

3. Semi-supervised learning

The Semi-supervised learning combines the best of both unsupervised and supervised machine learning. Semi-supervised learning uses a combination of labeled as well as unlabeled data to train its algorithms. Semi-supervised learning uses both datasets to overcome the disadvantages of the other options.

Take the example of a college student. Supervised learning is when a student learns a concept in college under the guidance of a teacher. Unsupervised learning is when a student learns the same concept by themselves at home, without any teacher’s supervision. Semi-supervised learning is when a student revises the concept under the guidance of a teacher at college.

4. Reinforcement learning

Reinforcement learning can be described as a feedback-based process. The AI component takes stock of its environment using the hit & test method and then takes action. It learns from past experiences and improves performance. Each good move is rewarded and every bad one is penalized. The reinforcement learning component is designed to maximize rewards for good actions.

Contrary to supervised learning reinforcement learning does not have labeled data. Agents learn through experiences and are therefore not subject to supervised learning. Consider video games. The environment is defined by the game, and the reinforcement agent’s actions define its state. The agent can be given feedback through punishments and rewards. This will affect the overall game score. Agents are expected to earn a high score.

Reinforcement learning can be applied to different fields, such as information theory and game theory. There are two main types of reinforcement learning algorithms.

  • Positive reinforcement learning : This is adding a reinforcer stimulus to an agent’s behavior, making it more likely that they will repeat the behavior in the future.
  • Negative reinforcement Learning: This refers to a strengthening of a behavior that prevents a negative outcome.


Machine Learning is a top technology that has been used in a lot of different technologies. And in this blog, you learned different types as well as a detailed definition of the same. Nevertheless, if you are someone who wants to develop a ML solution of your own, consult machine learning solutions development

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