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Category: Data Science Tutorials

Using Machine Learning and Natural Language Processing Tools for Text Analysis

This is a third article on the topic of guided projects feedback analysis. The main idea of the topic is to analyse the responses learners are receiving on the forum page. Dataquest encourages its learners to publish their guided projects on their forum, after publishing other learners or staff members can share their opinion of […]

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Tutorial: Reset Index in Pandas

In this tutorial, we’ll discuss the reset_index() pandas method, why we may need to reset the index of a DataFrame in pandas, and how we can apply and tune this method. We’ll also consider a small use case of resetting the DataFrame index after dropping missing values. To practice DataFrame index resetting, we’ll use a […]

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Tutorial: Filtering Pandas DataFrames

The Pandas library is a fast, powerful, and easy-to-use tool for working with data. It helps us cleanse, explore, analyze, and visualize data by providing game-changing capabilities. Having data as a Pandas DataFrame allows us to slice and dice data in various ways and filter the DataFrame’s rows effortlessly. This tutorial will go over the […]

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Tutorial: Connect, Install, and Query PostgreSQL in Python

Databases are everywhere — in your phone, on your computer, and behind your beloved applications. But what’s a database worth if you can’t query data from it? In this article, we’ll show you examples of querying any PostgreSQL-based database from your Python code. First, you’ll gain a high-level understanding of PostgreSQL and database connectors. Later […]

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Tutorial: How to Use the Apply Method in Pandas

The apply() method is one of the most common methods of data preprocessing. It simplifies applying a function on each element in a pandas Series and each row or column in a pandas DataFrame. In this tutorial, we’ll learn how to use the apply() method in pandas — you’ll need to know the fundamentals of […]

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Tutorial: Indexing DataFrames in Pandas

In this tutorial, we are going to discuss what indexing pandas dataframes means, why we need it, what kinds of dataframe indexing exist, and what syntax should be used for selecting different subsets. What is Indexing Dataframes in Pandas? Indexing a pandas dataframe means selecting particular subsets of data (such as rows, columns, individual cells) […]

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Tutorial: An Introduction to Python Requests Library

The Requests library simplifies making HTTP requests to web servers and working with their responses. In this tutorial, we will learn how to install and use the library and highlight its main features. What is Python Requests Library? The Requests library provides a simple API for interacting with HTTP operations such as GET, POST, etc. […]

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Installing R on your machine

At the beginning of 2020, the amount of data in the world was estimated at 44 zettabytes. The amount of data generated daily is expected to reach 463 exabytes by 2025. The primary sources of these data are the following: Social data from Facebook posts, tweets, google trends Machine data from medical devices, satellites, web […]

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How to Install the Anaconda Distribution on Your Computer

Before jumping into data science, you need to set up the required software and tools and learn how to use them. This tutorial will teach you how to install and use the Anaconda platform for building a data science ecosystem. You’ll also learn Conda to manage packages and environments using the command-line interface. Let’s dive […]

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Grouping Data: A Step-by-Step Tutorial to GroupBy in Pandas

In this tutorial, we will explore how to create a GroupBy object in pandas library of Python and how this object works. We will take a detailed look at each step of a grouping process, what methods can be applied to a GroupBy object, and what information we can extract from it. The 3 Steps […]

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