Category Archives: Visualizations

Visualizations both Serious and Whimsical.

Lollipops for Healthcare Quality Improvement

The Superstore Sales data that ships with Tableau makes life seem so easy: Numbers like Profit and Sales that go up, up, and up. But we don’t only measure things by how high they go, but also how low. Working with hospital quality data, we have small numbers like infection rates that we want to get even smaller. We have rates like the percentage of patients who receive aspirin on arrival that we want to get larger. And then there are measures like how many medication error events are reported that we of course want to get smaller, but we wouldn’t trust if that number got too small too soon because it might indicate under-reporting. Tack on situations like hospital units that may go for months or years without having any events (but are still mandated to report), data arriving at different times, and a variety of units with differing numbers of decimal places, and putting everything on one dashboard gets a wee bit complicated.

This is a process post about how I solved this problem for a hospital quality dashboard with some brilliant help, a dose of calculated fields, and a number of iterations. I presented this dashboard at the Tableau Customer Conference last month, and offer up this post as a a contribution to Tableau Design Month.

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Basic Monte Carlo Simulations in Tableau

This came through my Twitter feed this morning:

And I looked at the article, and thought, “I can do that in Tableau.” About 20 minutes later, out came a pi estimator:

There’s a circle mark for every iteration, you can crank it up to 1,000,000 marks (on Tableau Desktop I can go to 2,500,000 marks, the Tableau Public Server is a little more limiting). However, the data source only uses two rows, it pads them out using the data scaffolding technique pioneered by Joe Mako where we use Tableau’s domain padding to generate the additional rows. To publish to Tableau Public I needed to use a data extract which does not currently support a random number function, so I used Joshua Milligan’s Random Number Generation post from the Tableau Calculation Reference Library.

A Virtual Orrery in Tableau

My daughter loves gymnastics, watching animal dissection videos, kale chips, and space. I’ve always been fascinated by orrerys, and not having the mechanical skill to build one, I decided to make a virtual one for her, and of course thought of using my favorite visualization tool:

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