# Category Archives: Data Science

## Gaussian Mixture Models: What are they & when to use?

In machine learning and data analysis, it is often necessary to identify patterns and clusters within large sets of data. However, traditional clustering algorithms such as k-means clustering have limitations when it comes to identifying clusters with different shapes and sizes. This is where Gaussian mixture models (GMMs) come in. But what exactly are GMMs and when should you use them? Gaussian mixture models (GMMs) are a type of machine learning algorithm. They are used to classify data into different categories based on the probability distribution. Gaussian mixture models can be used in many different areas, including finance, marketing and so much more! In this blog, an introduction to gaussian …

## Seaborn: Multiple Line Plots with Markers, Legend

Do you want to learn how to create visually stunning and informative line plots that will captivate your audience by providing most apt information? Do you have the requirement of creating multiple line plots in the same figure representing sales of different products across different months in a year? Are you looking for a takeaway Python code with Seaborn library for creating line plots? If yes, you are in the right place. In this blog post, we’ll explore how to create multiple line plots with Seaborn, a powerful data visualization library built on top of Matplotlib. I will also show how to add markers to the line plots to make …

## ChatGPT for Data Science Projects – Examples

Data science is all about turning raw data into actionable insights and outcomes that drive value for your organization. But as any data science professional knows, coming up with new, innovative ideas for your projects is only half the battle. The real challenge is finding a way to turn those ideas into results that can be used to drive business success by doing proper data analysis and building machine learning models using most appropriate algorithms. Unfortunately, many data science professionals struggle with this second step, which can lead to frustration, wasted time and resources, and missed opportunities. That’s where ChatGPT comes in. As a language model trained by OpenAI, ChatGPT …

## Hypothesis Testing in Business: Examples

Are you a product manager or data scientist looking for ways to identify and use most appropriate hypothesis testing for understanding business problems and creating solutions for data-driven decision making? Hypothesis testing is a powerful statistical technique that can help you understand problems during exploratory data analysis (EDA) and identify most appropriate hypotheses / analytical solution. In this blog, we will discuss hypothesis testing with examples from business. We’ll also give you tips on how to use it effectively in your own problem-solving journey. With this knowledge, you’ll be able to confidently create hypotheses, run experiments, and analyze the results to derive meaningful conclusions. So let’s get started! Before going …

## Sklearn Algorithms Cheat Sheet with Examples

The Sklearn library, short for Scikit-learn, is one of the most popular and widely-used libraries for machine learning in Python. It offers a comprehensive set of tools for data analysis, preprocessing, model selection, and evaluation. As a beginner data scientist, it can be overwhelming to navigate the various algorithms and functions within Sklearn. This is where the Sklearn Algorithms Cheat Sheet comes in handy. This cheat sheet provides a quick reference guide for beginners to easily understand and select the appropriate algorithm for their specific task. In this cheat sheet, I have compiled a list of common supervised and unsupervised learning algorithms, along with their Sklearn classes and example use …

## Linear Regression Datasets: CSV, Excel

Linear regression is a fundamental machine learning algorithm that helps in understanding the relationship between independent and dependent variables. It is widely used in various fields for predicting numerical outcomes based on one or more input features. To practice and learn about linear regression, it is essential to have access to good quality datasets. In this blog, we have compiled a list of 15 datasets suitable for training linear regression models, available in CSV or easily convertible to CSV (Excel) format. I have also provided a sample Python code you can use to train using these datasets. List of Dataset for Training Linear Regression Models The following is a list …

## Supervised & Unsupervised Learning Difference

Supervised and unsupervised learning are two different common types of machine learning tasks that are used to solve many different types of business problems. Supervised learning uses training data with labels to create supervised models, which can be used to predict outcomes for future datasets. Unsupervised learning is a type of machine learning task where the training data is not labeled or categorized in any way. For beginner data scientists, it is very important to get a good understanding of the difference between supervised and unsupervised learning. In this post, we will discuss how supervised and unsupervised algorithms work and what is difference between them. You may want to check …

## Logit vs Probit Models: Differences, Examples

Logit and Probit models are both types of regression models commonly used in statistical analysis, particularly in the field of binary classification. This means that the outcome of interest can only take on two possible values / classes. In most cases, these models are used to predict whether or not something will happen in form of binary outcome. For example, a bank might want to know if a particular borrower might default on loan or otherwise. In this blog post, we will explain what logit and probit models are, and we will provide examples of how they can be used. As data scientists, it is important to understand the concepts …

## Sklearn Neural Network Example – MLPRegressor

Are you interested in using neural networks to solve complex regression problems, but not sure where to start? Sklearn’s MLPRegressor can help you get started with building neural network models for regression tasks. While the packages from Keras, Tensorflow or PyTorch are powerful and widely used in deep learning, Sklearn’s MLPRegressor is still an excellent choice for building neural network models for regression tasks when you are starting on. Recall that Python Sklearn library is one of the most popular machine learning libraries, and it provides a wide range of algorithms for classification, regression, clustering, dimensionality reduction, and more. In this blog post, we will be focusing on training a …

## Generative AI – Concepts, Use Cases, Examples

Machine learning has rapidly evolved over the past few years, with new techniques and methods emerging regularly. One of the most exciting and promising areas in this field is Generative AI. This is also termed as generative modeling. Generative AI or generative modeling refers to the modeling algorithms / methods which results in the creation of new data samples that are similar to existing data sets. This technique has gained immense popularity in recent times due to its ability to generate highly realistic images, videos, and music. As a data scientist, it is crucial to understand generative AI / modeling and its various applications. This powerful tool has been used …

## Neural Networks Interview Questions – Quiz #45

Are you preparing for a job interview in the field of deep learning or neural networks? If so, you’re likely aware of how complex and technical these topics can be. In order to help you prepare, we’ve put together a list of common neural network interview questions and answers in form of multiple-choice quiz. The quiz in this blog post covers basic concepts related to neural network layers, perceptron, multilayer perceptron, activation functions, feedforward networks, backpropagation, and more. We’ve included 15 multiple-choice questions, as well as 5 additional questions specifically focused on the backpropagation algorithm. I will be posting many more quizzes on the neural networks in time to come, …

## Google’s Free Machine Learning Courses: Learn from the Best

Machine learning has become a fundamental part of almost every industry today. With the increasing demand for data scientists and machine learning engineers, it has become imperative for professionals to keep themselves updated with the latest tools and techniques. Fortunately, Google offers a range of free machine learning courses that cater to professionals of all expertise levels. In this blog, we will explore the top Google machine learning courses that will help learners enhance their skills and stay ahead of the game. List of Free Machine Learning Courses by Google The following is a list of free machine learning courses from Google which you can take online. These courses can …

## Large language models: Concepts & Examples

Large language models (LLMs) have been gaining traction in the world of natural language processing (NLP) due to their ability to process massive amounts of text and generate accurate results. These models are trained on large datasets, which contain hundreds of millions to billions of words. LLMs, as they are known, rely on complex algorithms including transformer architectures that shift through large datasets and recognize patterns at the word level. This data helps the model better understand natural language and how it is used in context and then make predictions related to text generation, text classification, etc. This blog post aims to provide a comprehensive understanding of large language models, their …

## KMeans Silhouette Score Python Example

If you’re building machine learning models for solving different prediction problems, you’ve probably heard of clustering. Clustering is a popular unsupervised learning technique used to group data points with similar features into distinct clusters. One of the most widely used clustering algorithms is KMeans, which is popular due to its simplicity and efficiency. However, one major challenge in clustering is determining the optimal number of clusters that should be used to group the data points. This is where the Silhouette Score comes into play, as it helps us measure the quality of clustering and determine the optimal number of clusters. Silhouette score helps us get further clarity for the following …

## Linear Regression Explained with Real Life Example

In this post, the linear regression concept in machine learning is explained with multiple real-life examples. Both types of regression models (simple/univariate and multiple/multivariate linear regression) are taken up for sighting examples. In case you are a machine learning or data science beginner, you may find this post helpful enough. You may also want to check a detailed post on what is machine learning – What is Machine Learning? Concepts & Examples. Before going into the details, lets look at a small poem which can help us remember the concept of linear regression. Hope you like it. Linear Regression, a machine learning delight Fitting a line, to make predictions right …

## Why & When to use Eigenvalues & Eigenvectors?

Eigenvalues and eigenvectors are important concepts in linear algebra that have numerous applications in data science. They provide a way to analyze the structure of linear transformations and matrices, and are used extensively in many areas of machine learning, including feature extraction, dimensionality reduction, and clustering. In simple terms, eigenvalues and eigenvectors are the building blocks of linear transformations. Eigenvalues represent the scaling factor by which a vector is transformed when a linear transformation is applied, while eigenvectors represent the directions in which the transformation occurs. In this post, you will learn about why and when you need to use Eigenvalues and Eigenvectors? As a data scientist/machine learning Engineer, one must …