Book Image

DAX Cookbook

By : Greg Deckler
Book Image

DAX Cookbook

By: Greg Deckler

Overview of this book

DAX provides an extra edge by extracting key information from the data that is already present in your model. Filled with examples of practical, real-world calculations geared toward business metrics and key performance indicators, this cookbook features solutions that you can apply for your own business analysis needs. You'll learn to write various DAX expressions and functions to understand how DAX queries work. The book also covers sections on dates, time, and duration to help you deal with working days, time zones, and shifts. You'll then discover how to manipulate text and numbers to create dynamic titles and ranks, and deal with measure totals. Later, you'll explore common business metrics for finance, customers, employees, and projects. The book will also show you how to implement common industry metrics such as days of supply, mean time between failure, order cycle time and overall equipment effectiveness. In the concluding chapters, you'll learn to apply statistical formulas for covariance, kurtosis, and skewness. Finally, you'll explore advanced DAX patterns for interpolation, inverse aggregators, inverse slicers, and even forecasting with a deseasonalized correlation coefficient. By the end of this book, you'll have the skills you need to use DAX's functionality and flexibility in business intelligence and data analytics.
Table of Contents (15 chapters)

Utilizing the Mann-Kendall test

The Mann-Kendall test is a method of identifying whether or not there is a trend in a set of data points. The nice thing about the Mann-Kendall test is that the test can identify trends even if there is a seasonal component to the data (but not if the data is collected seasonally!). Also, the Mann-Kendall test is a non-parametric test. This means that the Mann-Kendall test works for data that does not fit a normal distribution (bell curve). The Mann-Kendall test is a useful computation that is perhaps most often used within the environmental, health, and social sciences but can be used in any situation where trends are important.

This recipe provides an implementation of the Mann-Kendall test in DAX.

Getting ready