Jenny Martin

Jenny Martin

Jenny Martin

Jenny’s journey to the Data School started with a Maths BSc in Nottingham, then up to Edinburgh for an MSc in Operational Research, back down to Hertfordshire for a role in the Insight team at Tesco and finally into London. Having discovered Tableau and Alteryx whilst working at Tesco, she knew that these are the tools she wanted to learn more about and build her future career upon.

Why not give Certified Pro a go?

This week I decided to try my luck with the Tableau Certified Professional Exam. Sure the Exam Prep Guide recommends a year's experience, but it's generally my philosophy that you might as well give it a go! ""What if I fall?"Oh but my darling,What if you fly?” ...

Joins, Unions, Blending – Combining Data Sources

Joins vs Unions When I first started the data school (way back in April) I would refer to the "coming together" of any 2 data sources as a "join". It wasn't long before I was taught how inaccurate this was and, indeed, the very first page of my data school notebook...

Revising Alteryx Gallery Ahead of the Advanced Exam

You may remember from a previous blog that my first attempt at the Alteryx Advanced Exam was unsuccessful. One of the reasons for this was that I didn't realise there would be questions on Alteryx Gallery (and indeed, didn't even know what Alteryx Gallery was!) This...

Machine Learning in Alteryx

Today we had the pleasure of being taught Machine Learning by Bene and it's honestly been one of my favourite days! It's a topic that sounds complicated, but once again Alteryx's drag and drop interface makes it simple. Machine Learning can be broken down into:...

A Powerful End to Dashboard Week

Today we were looking at the history of powerlifting and we had free rein of which tools we wanted to use! Read more in Andy's blog. This is probably the dataset that I've found most difficult to work with, as it's not one that I'm familiar with at all! So I spent the...

Building a Sweet Viz in Web Edit – Dashboard Week Day 4

Today we were working with some sweet data - literally. Our main challenges included preparing the data using Tableau Prep Builder and then building the dashboard in Web Edit on Tableau Server. Read the full task here. Sketch: If you've read any of my other blogs this...

An API and Power BI – Dashboard Week Day 3

The first part of the task today made me very happy - I love working with APIs and I like astronomy too. The second part of the task... not so much. Read more about our challenge today in Andy's blog. The Sketch: I thought it would be essential to sketch out my ideas...

England vs Scotland – Dashboard Week Day 2

Today we were looking at battles in Britain (full task in Andy's blog here). I didn't have such a structured process today and definitely suffered for it! I forgot to sketch out my ideas until semi-late in the process and then didn't even stick to my idea anyway. The...

Alien Invasion on Dashboard Week Day One

This week is Dashboard Week for DS14, which means a blog every single day! Andy posts our task around 9am and our first one can be found here. It involved webscraping data about UFO sightings, spooky. Step 1 - Sketch: After a quick peek at what fields were included in...

How to Create a Waterfall Chart

Back in my old job, I often saw waterfall charts being used to explain which factors were contributing to growth/decline in a particular area. I always thought these were a great visual representation of positive/negative influences, but never got around to creating...

Alteryx Advanced – A Step Up

Today I decided to give the Alteryx Advanced Exam a shot. I didn't do much specific preparation, but followed Hanna's advice that the best way to practise is to try the real thing. So how did I do...? I got 75%. So close, but so far! (The pass mark is 80%) Considering...

Tableau QA Fears – Justified?

You may remember a blog I wrote at the end of April, all about my hopes and fears for the Tableau QA exam. Well, first things first, I passed - yay! Let's revisit some of those fears and see if they were justified. Fear #1: Running out of Time This first fear was...

At last we have Parameter Actions!

Back in Week 15 of Makeover Monday, I accidentally used a Parameter Action. It was early on in my Tableau journey and I didn't realise that I had built my dashboard in the 2019.2 Beta. Of course, I was unable to upload this to Tableau Public and was disappointed. But...

Teamwork

Confession: I don't think that I'm naturally a very good team player When presented with a task, the first thing that I want to do is dive into the detail and unpick the problem. I want to translate it into words that my own brain can understand and, honestly, I fear...