Welcome in Yan Holtz's homepage.
I'm a data analysis and visualisation enthousiast with a background in biology.

Visit Contact

Hi, I'm Yan!

My job consists to help companies and researchers to analyse their datasets. I am skilled for most of the data-science steps: data pre-processing, application of statistical methods, data visualization and results communication.

I am currently working for the Queensland Brain Institute in Australia, where I develop data visualisation methods at the border between epidemiology and genetics.

Publication Talks Twitter Github
2012 Master Degree 2015 Data Analyst at INRA 2017 Freelance - Data analysis Queensland Brain Institute




A few stories about statistics, R, dataviz. More or less linked with our world, always related to data

From Data to Viz - A classification of graphics based on input data format

July 2018 - 6 minutes read

I’m delighted to announce a new dataviz project called Data to Viz. It is a classification of chart types based on input data format. It comes in the form of a decision tree leading to a set of potentially appropriate visualizations to represent the dataset. - Read more

Pimp my RMD - A collection of tips for R Markdown

July 2018 - 2 minutes read

R markdown creates interactive reports from R code. I’ve created a document that provides a few tips I use on a daily basis to improve the appearance of my html outputs (my memory aid). This document is built using R Markdown and hosted on Github. - Read more

I've developped several websites dedicated to data visualization. These resources are visited thousands of time every day.

R Graph Gallery

Thousands of R graphics, always with the reproducible code provided


Data To Viz

A classification of charts based on their input format, and a lot of trick and tips


Python Gallery

Thousands of Python graphics, always with the reproducible code provided



A glimpse of the projects I've been working on


Feel free to contact me for any question. For open source project, please open an issue or pull request on Github. If you want to follow my work, reach me on Twitter. Otherwise, send me an email at yan.holtz.data@gmail.com.

Github Twitter Mail