Naledi Hollbruegge

Naledi Hollbruegge

Naledi Hollbruegge

Naledi is a Social and Cultural Psychology graduate interested in the use of data to help understand societal dynamics and address social issues. She sees data visualisation as the key to communicating this information in a way that is comprehensible to everyone, regardless of their educational background, and thus a powerful tool to achieve meaningful change. Before coming to The Data School she worked in a variety of social research jobs.

Naledi enjoys creative and crafty activities such as baking, sewing, acting, photography and crocheting. Spending hours on creating a great colour scheme is never a waste of time.

Her favourite sport is volleyball. She will claim this is because of the team-work and technical aspects of the sport. But really it’s because there is minimal running involved.

Custom Geocoding in Tableau: Mapping London Tube Stops

I recently led a teaching day on Spatial Analytics for the rest of the dataschool. The first half of the day was dedicated to Alteryx practice and for the second half of the day we covered some of the spatial analytics topics relevant to Tableau. One of these is...

Tableau Tip Tuesday: Hiding the null indicator

My makeover monday submission this week included a bar chart on a dual axis with two lines representing averages for the individual country as well as all of Africa. For countries with very few malaria deaths the temporal patterns were obscured by the Africa average...

Alteryx Quick Tip: Find your tool number

When Alteryx highlights an error in your workflow it is often not very helpful in describing what is going wrong. It will however usually tell you where it is going wrong. If the error is occuring in your currently visible workflow it will typically mark the tool that...

Making an app with the List Box tool in Alteryx

This week I am creating my first app. One of the tools I am using is the List Box tool, which allows the user to select several options from a list that you can specify. This list of options can be created in several ways. The following three are probably the easiest...

Compound Growth Rate quick table calculation in Tableau

One of the options amongst your quick table calculations in to compute the 'compound growth rate' (CGR). The CGR is a measure of growth over multiple time periods. It denotes the growth rate from the initial value to the final value, assuming that the investment has...

Getting started with RegEx in Alteryx

What is the RegEx tool? The RegEx tool in Alteryx is very powerful once you are proficient at using it. RegEx is short for Regular Expression and is a formal language that is used not just in Alteryx but other contexts as well. It allows you to extract just those...

Why is my Alteryx Heatmap tool not working?

Recently, Ben outlined how to use the Create Grid and Heatmap tools in Alteryx, using data on car accidents across the UK. He based his Heatmap workflow on his Create Grid workflow since he already had that in place but actually the process of making heatmap can be...

Improve your Alteryx workflow speed by limiting records

Alteryx is a powerful tool that can deal with an impressive amount of data. But this can take some processing time, and when working with large amounts of data you probably don't want to wait several minutes for your data to be processed every time you change a...

Importing a page code in Alteryx: Two methods

Did you know you can import a website's source code through a Text Input Tool? I just finished an Alteryx project to download how MPs voted on various motions throughout the years. This extensive database is provided by www.publicwhip.org.uk in json format (see here)...

Alteryx Weekly Exercise: Week #13 Alternative Solution

This week we are strengthening our Alteryx skills. There are weekly exercises in the Alteryx community that are great as a learning resource and each of us are taking on one at a time and then presenting our solutions to the group. I worked on the exercise from week...

Alteryx tip: Two methods to annotate workflows

If you return to a workflow after some time it might be difficult to remember the reasoning behind each tool or setting or the logic that connects them all. Equally, if you are preparing a workflow in Alteryx for someone else, they will benefit from some guidance....

Tableau Tip: Changing Dimension Colours

By dragging a dimension to the colour shelf, each category is assigned a colour. This allows the user to quickly distinguish between different categories. Tableau assigns some default colours that you can then change in several ways. You can either click on the...

Alteryx quick tip: Change sentence case

I am currently working on election data from the 2016 London Mayoral election. In this dataset they annoyingly capitalised a proportion of the ward names. In order to alter the capitalisation in a column you can use the Data Cleansing tool. Just drag this to the...

Importing multiple URLs in Alteryx

The task for yesterday afternoon was to take data from https://data.police.uk/ and run it through Alteryx to make it useable in Tableau. Peter has previously written about the work he has done with this dataset. With this API you need to specify both a location...