Preprocessing Data with NumPy

所在平台: Udemy

课程主页: https://www.udemy.com/course/preprocessing-data-with-numpy/

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**课程名称:使用 NumPy 预处理数据** **课程概述:** 本课程旨在弥补数据分析、数据科学和编程课程在处理原始数据、数据清洗和预处理方面的不足。您将学习如何使用 NumPy 这一强大的 Python 库来应对真实世界中杂乱无章的数据,从而成为一名独立的数据专业人士。尽管许多在线课程和现场教学倾向于使用“干净”的数据,但本课程将专注于提供实际操作所需的技能,帮助您在求职和实际工作中脱颖而出。 **课程内容:** * **NumPy 的 ndarray 类及其应用:** 深入了解 NumPy 的核心——ndarray 类,并探讨其重要性。 * **数组数据类型:** 熟悉数组中常见的数据类型。 * **数据集的切片与压缩:** 学习如何精确地提取和处理数据集的特定部分。 * **数组维度及其降维:** 理解多维数组的概念,并掌握降低维度的方法。 * **伪随机数据生成:** 学习如何生成用于测试和模拟的随机数据。 * **导入外部文本文件数据:** 掌握从外部文本文件中读取数据的技巧。 * **导出数据到外部文件:** 学习如何将处理好的数据保存到外部文件。 * **数据集统计计算:** 运用 NumPy 计算数据的最大值、最小值、平均值、方差等统计量。 * **数据清洗:** 学习识别和处理数据中的错误、缺失值和异常值。 * **数据预处理:** 掌握将原始数据转换为适合分析和可视化格式的各种技术。 * **最终实践案例:** 通过一个全面的实践项目,巩固所学知识,将所有操作串联起来。 **为何学习 NumPy?** 数据分析工作很大一部分是数据预处理。NumPy 在处理这些繁琐的数学和统计运算方面表现出色。它提供了多维数组结构以及丰富的内置函数和方法,是进行高性能科学计算和数据分析的必备工具。掌握 NumPy 将极大地提升您的数据分析能力,使您在众多求职者中脱颖而出。 **课程优势:** * **循序渐进:** 内容组织合理,确保您能轻松理解每个概念。 * **实践导向:** 提供详尽操作步骤,无省略,确保您能跟上学习节奏。 * **就业导向:** 课程内容涵盖求职面试中经常出现的实际任务和概念。 * **社区支持:** 加入一个由志同道合的数据分析师组成的社区。 * **认证证书:** 完成课程可获得结业证书。 * **持续更新:** 享受课程的定期更新。 * **真实世界训练:** 学习如何在真实场景中使用 NumPy。 **立即行动,成为数据分析领域的 NumPy 专家!**

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The problemMost data analyst, data science, and coding courses miss a crucial practical step. They don't teach you how to work with raw data, how to clean and preprocess it. This creates a sizeable gap between the skills you need on the job and the abilities you have acquired in training. Truth be told, real-world data is messy, so you need to know how to overcome this obstacle to become an independent data professional.The bootcamps we have seen online, and even live classes neglect this aspect and show you how to work with ‘clean' data. But this isn't doing you a favor. In reality, it will set you back both when you are applying for jobs, and when you're on the job.The solutionOur goal is to provide you with complete preparation using the NumPy package. This course will turn you into capable data analyst with a fantastic understanding of one of the most prominent computing packages in the world. To take you there, we will cover the following topics extensively.· The ndarray class and why we use it· The type of data arrays usually contain· Slicing and squeezing datasets· Dimensions of arrays, and how to reduce them· Generating pseudo-random data· Importing data from external text files· Saving/Exporting data to external files· Computing the statistics of the dataset (max, min, mean, variance, etc.)· Data cleaning· Data preprocessing· Final practical exampleEach of these subjects builds on the previous ones. And this is precisely what makes our curriculum so valuable. Everything is shown in the right order and we guarantee that you are not going to get lost along the way, as we have provided all necessary steps in video (not a single one skipped). In other words, we are not going to teach you how to concatenate datasets before you know how to index or slice them.So, to prepare you for the long journey towards a data science position, we created a course that will show you all the tools for the job: The Preprocessing Data with NumPy course [MG1].We believe that this resource will significantly boost your chances of landing a job, as it will prepare you for practical tasks and concepts that are frequently included in interviews.NumPy is Python's fundamental package for scientific computing. It has established itself as the go-to tool when you need to compute mathematical and statical operations.Why learn it?A large portion of a data analyst's work is dedicated to preprocessing datasets. Unquestionably, this involves tons of mathematical and statistical techniques that NumPy is renowned for. What's more, the package introduces multi-dimensional array structures and provides a plethora of built-in functions and methods to use while working with them. In other words, NumPy can be described as a computationally stable state-of-the-art Python instrument that provides great flexibility and can take your analysis to the next level.Some of the topics we will cover:1. Fundamentals of NumPy2. Random Generators3. Working with text files4. Statistics with NumPy5. Data preprocessing6. Final practical example1. Fundamentals of NumPyTo fully grasp the capabilities of NumPy, we need to start from the fundamentals. In this part of the course, we'll examine the ndarray class, discuss why it's so popular and get familiar with terms like "indexing", "slicing", "dimensions" and "reducing".Why learn it?As stated above, NumPy is the quintessential package for scientific computing, and to understand its true value, we need to start from its very core - the ndarray class. The better we comprehend the basics, the easier it's going to be to grasp the more difficult concepts. That's why it's fundamental to lay a good foundation on which to build our NumPy skills.2. Random GeneratorsAfter we've learned the basics, we'll move on to pseudo-random data and random generators. These generators will help construct a set of arbitrary variables from a given probability distribution, or a fixed set of viable options.Why learn it?Working in a data-driven field, we sometimes need to construct partially arbitrary tests to see if our code works as intended. And here lies the value of random generators, as they allow us to construct datasets of pseudo-random data. The added benefit of random generators is that we can set a seed if we wish to replicate a particular randomization, but we'll go into all the details in the course itself.3. Working with text filesExchanging information with text files is practically how we exchange information today. In this part of the course, we will use the Python, pandas, and NumPy tools covered earlier to give you the essentials you need when importing or saving data.Why learn it?In many courses, you are just given a dataset to practice your analytical and programming skills. However, we don't want to close our eyes to reality, where converting a raw dataset from an external file into a workable Python format can be a massive challenge.4. Statistics with NumPyOnce we've learned how to import large sets of information from external text files, we'll finally be ready to explore one of NumPy's strengths - statistics. Since the package is extremely computationally durable, we often rely on its functions and methods to calculate the statistics of a sample dataset. These include the likes of the mean, the standard deviation, and much more.Why learn it?To become a data scientist, you not only need to be able to preprocess a dataset, but also to extract valuable insights. One way to learn more about a dataset is by examining its statistics. So, we'll use the package to understand more about the data and how to convert this knowledge into crucial information we can use for forecasting.5. Data preprocessingEven when your dataset is in clean and comprehensible shape, it isn't quite ready to be processed for visualizations and analysis just yet. There is a crucial step in between, and that's data preprocessing.Why learn it?Data preprocessing is where a data analyst can demonstrate how good or great they are at their job. This stage of the work requires the ability to choose the right statistical tool that will improve the quality of your dataset and the knowledge to implement it with advanced pandas and NumPy techniques. Only when you've completed this step can you say that your dataset is preprocessed and ready for the next part, which is data visualization.6. Practical exampleThe course contains plenty of exercises and practical cases. What's more, in the end, we have included a comprehensive practical example that will show you how everything you have learned along the way comes nicely together. This is where you will be able to appreciate how far you have come in your journey on mastering NumPy in your pursuit of a data career.What you get· Active Q & A support· All the NumPy knowledge to become a data analyst· A community of aspiring data analysts· A certificate of completion· Access to frequent future updates· Real-world trainingGet ready to become a NumPy data analyst from scratchWhy wait? Every day is a missed opportunity.Click the "Buy Now" button and become a part of our data analyst program today.

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