Machine Learning

What is Machine Learning?

Machine learning is a branch of AI. ML consists of creating algorithms allowing computers to learn from data and make predictions or decisions. This is accomplished without needing explicit programming for each task. 

It is unlike traditional programming where humans provide specific instructions. Machine learning lets computers uncover patterns from data to carry out tasks.


How is Machine Learning Algorithm Trained?

Machine learning algorithms learn from data through a process called training. The algorithm is first exposed to a large amount of data. It learns to identify patterns and correlations within the dataset. 

These patterns are captured in a model. This model is then used to make predictions or decisions on new, unseen data.

The algorithm can adjust its internal parameters. This allows it to minimize the difference between its predictions and the actual outcomes in the training data.

The training process involves a balance between capturing underlying patterns in the data while avoiding overfitting. It requires domain knowledge, data understanding, and an iterative approach to refine the model’s performance.


Different Types of Machine Learning Techniques

There are four main types of machine learning techniques. These techniques cater to different types of problems and data scenarios. Choosing the right technique depends on several factors. These include the task you want to accomplish, the nature of the data, and the amount of available data.


  • Supervised Learning

It is the most common type of machine learning. In supervised learning, the machine is given a set of labeled data, where each data point has a known output value. 

The machine then learns to map the input data to the output values. This type of learning is used for tasks such as classification, regression, and prediction.


  • Unsupervised Learning

This type of learning is used when the machine is not given any labeled data. The machine must learn to find patterns in the data on its own. Unsupervised learning is used for tasks such as pattern recognition, clustering, anomaly detection, and dimensionality reduction.


  • Semi-supervised Learning

This method is a hybrid of supervised and unsupervised learning. The machine is given a set of labeled data, as well as a set of unlabeled data. 

The machine then learns to use the labeled data to improve its predictions on the unlabeled data. This type of learning is often used when there is not enough labeled data to train a supervised learning model.


  • Reinforcement Learning

Reinforcement learning is the process of training an agent to make a series of decisions in an environment to maximize a reward signal. 

The agent is taught through trial and error. It constantly adjusts its actions based on the rewards it receives. Applications include game playing, robotics, and autonomous systems.

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