Mary-Leena Tchenkoue

Mary-Leena has a background in Theoretical Physics and completed her PhD in 2021. During her doctoral research she did a lot of computations and simulations of atomic systems through which she developed her interest for data analysis. Making sense out of numbers and data then became a passion, so she decided to join the Data School.

Since joining The Data School, she has obtained the Alteryx Designer Core and the Tableau Desktop Certified Data Analyst Certificate. During her first placement with an energy provider she contributed in developing and improving Tableau dashboards for the Sales and Marketing team. She also used Alteryx extensively to create workflows for data preparation.

Outside of work, Mary-Leena enjoys travelling, singing, swimming and board games.

Certifications

Blog Posts

Thu 02 Jun 2022 | Mary-Leena Tchenkoue

Dashboard Week Day 3 - Gender Pay Gap UK

The famous week finally arrived. The task for the last week of training at the Data School is straightforward: everyone gets the same dataset and has to present a dashboard at the end of the day. There is vast room for creativity. However, this was not very straightforward for me

Wed 01 Jun 2022 | Mary-Leena Tchenkoue

Word Cloud in Tableau

Today we had to work with data of Elon Musk's tweets and one interesting chart that came to my mind was doing a word cloud of his most tweeted words. You need to have a column containing these tweets; this was also in the dataset. First you need to do some little cleaning which I did in alteryx

Mon 30 May 2022 | Mary-Leena Tchenkoue

Dynamic Top N Filter

One of the common charts for visualisation are Top N charts, for exmaple, top 10 Products by sales or profit. Top N filters can be created by putting the dimension on the filter card and using the 'TOP' pane in the filter configuration pop up

Tue 31 May 2022 | Mary-Leena Tchenkoue

Compare to a Selected Dimemsion

It is possible to use quick table calculations to display the difference or change in a quantity, e.g Sales, along a given axis. These table calculations can also be configured to compare to either the FIRST, LAST, NEXT or PREVIOUS point on the given axis

Mon 07 Mar 2022 | Mary-Leena Tchenkoue

Tips on being a good Trainer

As a data schooler, we get to be on the receiving end most of the time during the training. However, early in the training phase, we got a feeling of what it's like to be on the giving side as the trainer. It was a challenging experience as we had to do a 3-minute demo of a training session

Fri 13 May 2022 | Mary-Leena Tchenkoue

Re-create Tableau's Average line using LOD and Table Calculation

The analytics pane in Tableau allows to quickly create an average line by simple drag and drop. However, it is not possible to make calculations with this average line because Tableau does not allow it to be saved in the data pane

Thu 12 May 2022 | Mary-Leena Tchenkoue

Sparklines KPI

Sometimes we may want to have more than just a BAN for KPIs but also a trendline/sparkline of the KPI. As an example, I show how to create a sparkline KPI for Sales using sample Superstore data. Put continuous quarter of Order Date to columns and Sales to rows

Mon 11 Apr 2022 | Mary-Leena Tchenkoue

A week as Project Manager on Client Project

Two weeks ago, I had the opportunity to manage our weekly client project and would like to share my experience. It started on Monday with the kick-off call during which the client's requirement for the project were gathered

Tue 29 Mar 2022 | Mary-Leena Tchenkoue

Alteryx Designer Core Certification: My Experience

I finally got my Alteryx Core Designer certification after taking the exam a second time. This was a great experience that reminded me that when we fail, it is up to us to either give up or learn from the failure and start again. We first took the certification exam during the 3rd week of training

Tue 08 Mar 2022 | Mary-Leena Tchenkoue

Connecting the Dots In Alteryx

Today we learnt how to connect points on a map using Spatial tools in Alteryx. This could be useful to create a number of insightful visualizations

Wed 16 Feb 2022 | Mary-Leena Tchenkoue

Adding context to your visualizations

It's been just over a week since I started at the Data School and we already got to learn a lot of interesting basic concepts about data analysis and visualization. Last Monday, we got into more details on how to make our data visualizations better