บทเรียนการวิเคราะห์ข้อมูล

This tutorial walks you through Microsoft Fabric, showing you how to set up, connect data, build pipelines, and collaborate—all in one practical guide!

See how to use VLOOKUP() to pull data from another sheet in your Excel workbook. Build confidence with practical examples and troubleshooting techniques.

Enhance your visualizations with Matplotlib colormaps. Learn to pick the right colormap, adjust color classes, and troubleshoot common visualization issues.

Create standout bar charts using Matplotlib, Seaborn, Plotly, Plotnine, and Pandas. Explore bar chart types, from simple vertical and horizontal bars to more complex grouped and stacked layouts.

Understand how to derive the characteristic equation of a matrix and explore its core properties. Discover how eigenvalues and eigenvectors reveal patterns in data science applications. Build a solid foundation in linear algebra for machine learning.

Discover the power of the geometric mean in finance, biology, and data science. Learn how to calculate it, when to use it, and why it's useful for analyzing growth rates.

Learn how to find p-value in Excel using Excel functions like T.TEST() and Z.TEST(), by using the Data Analysis Toolpak, or through manual calculations. Equip yourself to make confident, data-backed decisions in Excel.

Explore the different methods for filtering out and permanently removing duplicate rows using SQL. Learn the practical applications of how to remove duplicates in SQL Server, MySQL, and PostgreSQL.

Explore the arithmetic mean's role in data analysis. Learn its formula, applications, and how it compares to other kinds of means and other statistical measures, and understand when each is most useful.

Uncover the impact of multicollinearity on regression models. Discover techniques to detect multicollinearity and maintain model reliability. Learn how to address multicollinearity with practical solutions.

Discover the key differences, applications, and implementation of normalization and standardization in data preprocessing for machine learning.

The SUMMARIZE() function in DAX creates summary tables by grouping data and applying aggregate functions in tools like Power BI and Excel Power Pivot. Keep reading to learn how to use DAX SUMMARIZE() to group and aggregate your data and derive good insights.