Introduction to treemaps Bar charts are surely well know but let’s spend a few words on treemaps now. A treemap is a chart type that displays hierarchical or part-to-whole relationships via rectangles. In case of hierarchical (tree-structured) data these rectangles are nested. The space in the view is divided into rectangles that are sized and ordered by a measure. Nested rectangles mean that hierarchy levels in the data are expressed by larger rectangles (above in the hierarchy) containing smaller ones (below in the hierarchy). The rectangles in the treemap range in size from the top left...Read More
The phrase “one version of the truth” is thrown around a lot when talking about democratising data throughout an organisation. But is it a good idea?
In this post Craig explores his thoughts and experiences around the implementation of this paradigm, whether or not it’s a good idea for a modern workforce and what he believes is a better approach.Read More
Show Me How: Symbol Maps Using maps in Tableau is a very powerful tool that can quickly show the user geographical data at a glance. In this post I will show you how you can build a Symbol Map quickly using the “Show Me” feature in Tableau Desktop. What is a Symbol Map? Symbol Maps are simply maps that have a mark displayed over a given Longitude and Latitude. Using the “Marks” card in Tableau you can quickly build up a powerful visual that informs users about their data in relation to its location. These maps can be as simple or as complex as you need them to...Read More
Aside from methods using RAWSQL functions or SCRIPT functions to call out to SQL/JET and R respectively then there is no function that will allow you to bring a random number into your Tableau workbook.
Instead you’re going to have to use a random number generator such as a Linear congruential generator (LCG), let’s have a look at how to implement it in TableauRead More
We often get asked about how to start influencing people who just want the numbers, to start moving them towards more visualised dashboards. For me, that answer includes Highlight Tables. Let’s remember that data visualisation is focused on letting users of a dashboard analyse their data to find the meaning and story in the data quickly and easily. Highlight Tables do exactly as their name suggests – it adds highlights for the user to read the table more quickly. Find the highest value in the table below: Both tables are the same, just one is using colour to give visual clues as to where to...Read More
It is slightly ironic that while preparing last weeks post for the Show Me How series on Heat Maps in Tableau I was also preparing this, rather more complex post, on another form of heat mapping in Tableau – this time in the form of chloropleth maps. Heat Mapping in this sense is straightforward in Tableau when in the form of Polygons datasets or points in just a few clicks, however it can be difficult to achieve any sense of further geographic analysis such as thematic gradients. In this post I want to explore I have worked around that problem using Alteryx, and show you how you can...Read More