What is the role of data in machine learning and how toprepare it for training?


May 1, 2023
What is the role of data in machine learning and how to

The role of data in machine learning

The quality and quantity of data used to train a machine learning model plays a critical role in the performance of the model. The data used to train the model should be representative of the real-world scenarios that the model will encounter in production. The data should also be diverse enough to capture the various nuances of the problem being solved.

Types of data used in machine learning

Structured data

Structured data is data that is organized in a tabular format with well-defined rows and columns. Structured data is easy to analyze and process, making it the most common type of data used in machine learning. Examples of structured data include data from spreadsheets, databases, and CSV files.

Unstructured data

Unstructured data is data that does not have a pre-defined structure. Examples of unstructured data include text, images, and videos. Unstructured data is difficult to analyze and process, but it contains valuable information that can be used to train machine learning models.

Steps to prepare data for machine learning

Data cleaning

Data cleaning involves removing any irrelevant or duplicate data from the dataset. It is also important to check for missing values and outliers in the data.

Data transformation

Data transformation involves converting the data into a format that can be easily used by machine learning algorithms. This may involve converting categorical data into numerical data, scaling the data, or normalizing the data.

Feature selection

Feature selection involves selecting the most relevant features from the dataset. This helps to reduce the dimensionality of the dataset and improve the performance of the model.

Feature scaling

Feature scaling involves scaling the features in the dataset so that they have a similar range. This is important because some machine learning algorithms are sensitive to the scale of the features.

Data splitting

Data splitting involves splitting the dataset into training data and testing data. The training data is used to train the machine learning model, while the testing data is used to evaluate the performance of the model.


In conclusion, data plays a critical role in machine learning. The quality and quantity of data used to train a machine learning model can greatly affect its performance. To prepare data for machine learning, it is important to clean and transform the data, select relevant features, scale the features, and split the data into training and testing sets. By following these steps, we can improve the accuracy and reliability of our machine learning models.

FAQs (Frequently Asked Questions)

Q: What is the minimum amount of data required to train a machine learning model?

A: There is no fixed minimum amount of data required to train a machine learning model. The amount of data required depends on the complexity of the problem being solved and the type of machine learning algorithm being used.

Q: Can machine learning models be trained on unstructured data?

A: Yes, machine learning models can be trained on unstructured data, but it requires additional preprocessing and feature engineering.

Q: What is the difference between supervised and unsupervised machine learning?

A: In supervised machine learning, the algorithm is trained on labeled data, whereas in unsupervised machine learning, the algorithm is trained on unlabeled data.

Q: How do you know if your machine learning model is overfitting or underfitting?

A: Overfitting occurs when the model performs well on the training data but poorly on the testing data. Underfitting occurs when the model performs poorly on both the training and testing data.

Perfect eLearning is a tech-enabled education platform that provides IT courses with 100% Internship and Placement support. Perfect eLearning provides both Online classes and Offline classes only in Faridabad.

It provides a wide range of courses in areas such as Artificial Intelligence, Cloud Computing, Data Science, Digital Marketing, Full Stack Web Development, Block Chain, Data Analytics, and Mobile Application Development. Perfect eLearning, with its cutting-edge technology and expert instructors from Adobe, Microsoft, PWC, Google, Amazon, Flipkart, Nestle and Infoedge is the perfect place to start your IT education.

Perfect eLearning provides the training and support you need to succeed in today's fast-paced and constantly evolving tech industry, whether you're just starting out or looking to expand your skill set.

There's something here for everyone. Perfect eLearning provides the best online courses as well as complete internship and placement assistance.

Keep Learning, Keep Growing.

If you are confused and need Guidance over choosing the right programming language or right career in the tech industry, you can schedule a free counselling session with Perfect eLearning experts.

Hey it's Sneh!

What would i call you?

Great !

Our counsellor will contact you shortly.