Учебные материалы по анализу данных

The SUMIFS() function in Excel sums values that meet multiple criteria, making it useful for conditional calculations with numbers, dates, and text. Learn to use SUMIFS() with syntax, examples, and best practices.

Learn to subtract cells, columns, rows, and more in Excel using the minus sign, cell references, absolute references, and even by using the `SUM()` or SUMPRODUCT() functions.

Learn how to create pixel-perfect paginated reports in Power BI, from setup to design and publishing, using Power BI Report Builder.

Excel's CLEAN() function cleans up text by removing non-printable characters. Combine it with other functions like TRIM(), SUBSTITUTE(), and REPLACE() for a cleaner spreadsheet.

Explore how the TRIM() function removes extra spaces and cleans up your data. Combine it with other functions like SUBSTITUTE(), CLEAN(), and VALUE() to fix all kinds of formatting issues.

Discover the intricacies of the negative binomial distribution and its applications. Learn how to model count data effectively. Explore practical examples and visual aids to enhance your understanding.

Learn to count unique values in Excel using basic and advanced formulas. See the difference between unique and distinct values.

There are multiple ways to generate random numbers in Excel, such as the `RAND(),` `RANDBETWEEN(),` and `RANDARRAY()` functions.

Python inheritance allows you to build new classes by reusing and extending the functionality of existing ones. Learn how to design parent-child class relationships, implement inheritance patterns, and apply techniques such as method overriding.

Merge two columns in Excel using the ampersand & operator or the CONCAT() function with a custom delimiter. Or use TEXTJOIN(), which lets you ignore blank cells.

Discover how to extract numbers from Excel strings using formulas. Master functions like RIGHT(), LEFT(), and TEXTJOIN() to target numeric data before, after, or anywhere in your text.

Read all about Tableau crosstabs so you can accurately display numerical data. Customize your Tableau crosstab with formatting, filters, parameters, indicator icons, and sparklines to reveal hidden insights.