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TIBCO Spotfire: A Comprehensive Primer

TIBCO Spotfire: A Comprehensive Primer

By : Phillips
4.1 (15)
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TIBCO Spotfire: A Comprehensive Primer

TIBCO Spotfire: A Comprehensive Primer

4.1 (15)
By: Phillips

Overview of this book

If you are a business user or data professional, this book will give you a solid grounding in the use of TIBCO Spotfire. This book assumes no prior knowledge of Spotfire or even basic data and visualization concepts.
Table of Contents (12 chapters)
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11
Index

Slicing and dicing data using hierarchy nodes


Spotfire provides a set of OVER functions to allow you to aggregate data over the nodes of a hierarchy, usually a date hierarchy but not necessarily. At its simplest level, the OVER function is a means to define at what granularity you wish to aggregate a value. For example, you could create the following calculated column in the baseball data:

Avg([Hits]) OVER [Team]

The result would be the average number of hits achieved by the players in each team. As each team has more than one row in the data, the lowest granularity of which is a player, you will end up with the following result:

The OVER function has some more advanced and challenging methods. On their own, these methods may not initially seem particularly useful to you and may even be a little hard to understand. However, they become very powerful when used in expressions.

In Chapter 1, Show Me the Data, when considering the key data concept of rows and columns, we saw that you cannot subtract...

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