Tableau Prep is a great tool for dealing with messy or unorganized data. After understanding the basics, one of the first things I found myself wondering was “does Tableau Prep have the ability to unpivot data?”. It has a pivot feature but does not have an unpivot or transpose feature at this point. However, there is a workaround.
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Have you received the error “Cannot mix aggregate and non-aggregate arguments with this function.” in Tableau before?
I have worked with a number of educational institutions, What I’ve found about those institutions, and many other organizations, is that many of them customize the way they track data over time. With a school it might be by trimester, with a restaurant chain it might be by period (there are 13 per year). These types of date fields require customized calculations.
When you have so many fields in your Tableau workbook that a scroll bar appears in your data window, you need to find a way to organize your fields.
“How do you calculate a headcount at a moment in time when you only have a start and end date?” I’ve gotten this question several times. My answer used to be “Ideally, you’d want a row of data for an individual for every possible date unit you’d want to count them at.”
If you haven’t had a chance to check it out for yourself yet, I want to introduce you to Tableau’s latest breakthrough, the “viz in tooltip”. Let me show you how this works and why it’s valuable.
There will likely be times when you want to calculate performance year to date versus the same time period prior year to date.
Have you ever had an asterisk (*) returned in place of a value in Tableau? This unexpected behavior is the result of what’s called the Attribute function (ATTR). We’ll look into it more here.
Let’s imagine that we work for a restaurant chain and are helping perform an analysis to figure out which items are under-performing. We’ll start with a visual like this...
Last spring I climbed Mount Rainier. Being an adventurous, outdoorsy, Pacific-Northwest born kid, it’s something I’d always dreamed about. While I enjoy physically grueling events, I’m a naturally risk averse person. I needed some friends to finally convince me to do it.
I want to teach you a method I’ve used with various clients when they needed a flexible date field as part of their Tableau dashboard. In one example, I was working with a company that was using Tableau to create client-facing reports. Problem is, they had different granularities of data for different clients. For some clients they collected data daily, others monthly, and some yearly. What they needed was the ability to create a flexible dropdown that allowed them to change the level of date granularity in the view.
If you’ve ever received the error “Cannot mix aggregate and non-aggregate comparisons or results in ‘IF’ expressions in Tableau I feel your pain. I spent my first several months in Tableau not understanding what that error meant and running into impassable roadblocks aggregating data in Tableau as a result.