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Understanding Correlation Coefficient: Definition and Applications
To better understand data, it’s essential to analyze its relationships. And to facilitate this analysis when faced with tens of thousands of lines of data, there are mathematical formulas. In particular, the correlation coefficient. What is the correlation coefficient? Relationship and dependence between two variables Before we can understand the correlation coefficient, we need to […]
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What is a root mean square error?
.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px} The root mean square error (RMSE) is an indicator for verifying the reliability of a model. This tool studies the discrepancies between the values actually observed and the values predicted by the model. The squared error is a value that is always positive. The closer the values obtained […]
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Prompt Engineer: Everything you need to know about this new AI role
With the democratization of generative artificial intelligences like ChatGPT, new needs are emerging in the business world. To fully harness the potential of these chatbots, it is essential to understand how to communicate with them and make oneself understood in order to achieve the best possible results. This is why experts capable of “taming” AI […]
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Typing and Annotation in Python: How does it work?
When you’re learning to code in Python, the question of typing is one that is rarely considered, whereas it’s unavoidable with a language like Java. So where does this “oversight” on the part of one of the most widely used programming languages of the last decade come from? To answer this question, it’s important to […]
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Demystifying SQL Index: Understanding its Purpose and Functionality
An SQL index enables you to quickly locate the data you’re looking for in a relational database. Find out all you need to know about this valuable tool, and why it’s so useful in Data Science! Efficient access to information is a priority in Data Science. That’s why professionals use databases to manage, store and […]
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INSERT INTO SQL: Insert data with this SQL query
To insert data into your SQL table, you can use the INSERT INTOSQL query. But how does it work? That’s what we’re going to look at in this article. What is an INSERT INTO SQL request? INSERT INTO SQL is one of the most commonly used commands in the SQL language. And with good reason: […]
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How to freeze rows in Excel: A quick and easy tutorial
Large data sets can be easily analyzed and organized using Microsoft Excel. But it is very useful to know How to freeze rows in Excel… However, when working with large spreadsheets, it’s easy to lose track of what each column or row represents. For data analysis, good visibility is essential. But when spreadsheets comprise several […]
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Selenium Python: Euronews web scraping case study
What is web scraping? As a Data Scientist, Data Engineer, or Data Analyst, you often find yourself handling datasets that will feed into an application, a Machine Learning algorithm, or data analysis. In some cases, you may use pre-constructed datasets, but there are instances where you need to create your own dataset or supplement an […]
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Dust: What is it? How can it be used for prompt engineering?
With the proliferation of generative AI tools, mastering the art of writing prompts is proving more than essential. But at the speed at which artificial intelligence solutions are evolving, many users are feeling lost. That’s when Dust was born. This prompt engineering tool helps users not only to write relevant guided messages, but also to […]
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Active Directory: What is it? How does it work?
<p>Active Directory is a directory service created by Microsoft, at the heart of many IT infrastructures. It enables centralised, secure and scalable management of resources and users. Find out why this solution has become essential, and remains so today in the age of the Cloud! Not so long ago, faced with the complexity of IT […]</p>
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Kimball Method: What is it? How do I use it?
<p>The volume of data generated and used by companies continues to grow exponentially. In this context, the efficient structuring and organization of this data for optimal analysis is of paramount importance. Dimensional modeling is an inescapable solution to this challenge. It is a methodological approach to the design of data warehouses. Ralph Kimball, a pioneer […]</p>
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Pytest for Python: Why and how to use it?
<p>Why test your code? In a previous article, we discussed why unit tests are fundamental for ensuring the quality and proper functioning of code. As a reminder, unit tests are designed to independently test different parts of code, unlike integration tests that verify the functioning of the code as a whole. They also differ from […]</p>
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