Yan Holtz

Software engineer who ❤️ #dataviz.

Creator of and the R, Python, D3 and React graph galleries.

➡️ 🌊 🍺

[Yan Holtz @R_Graph_Gallery]

😅 Finally! 🍾

➡️ 6 months of work later, I'm launching my https://t.co/wK6l6vXJe9 project! ❤️

If you're using #Rstats for data analysis, you will very likely enjoy it!

🙏 Thanks so much to the 200+ early adopters!

⏰ Pre-launch price available until the end of the day

[Yan Holtz @R_Graph_Gallery]

@Matt_Monnot Nice!

[Yan Holtz @R_Graph_Gallery]

By the way, the course is half price for Students, Academics and lower income countries!

[Yan Holtz @R_Graph_Gallery]

I'm launching a new project! 🍾🎉

A course that teaches how to build #dataviz on the web with D3.js & React.

Now that AI is here, those tools are finally accessible to create stunning interactive charts.

A few days left to join https://t.co/pBEsMlGmXp!

[Yan Holtz @R_Graph_Gallery]

@pawjast Well it's a html file hosted on Github Pages

[Yan Holtz @R_Graph_Gallery]

I spent 2 years building this.

I left my job to teach programming and dataviz, and now 4 projects are finally live:
1️⃣ https://t.co/wK6l6vYh3H
2️⃣ https://t.co/sCU4ungvzw
3️⃣ https://t.co/HxJb2xaYZx
4️⃣ https://t.co/0B6a1ecgqy

They’re all 50 percent off until Sunday! 😀

[Yan Holtz @R_Graph_Gallery]

I just released https://t.co/0B6a1ebIB0

➡️ a tool to build a good looking portfolio in a few minutes!

If your work is more or less related with #data, I think you'll like it!

[Yan Holtz @R_Graph_Gallery]

@matplotlib is confusing.

But it gets much better once you understand that only the "Axes" interface is useful.

Get rid of the "Pyplot" interface and you just divided the complexity by 2!

https://t.co/DO4Pdm0pUq

[Yan Holtz @R_Graph_Gallery]

🎉 Want to build better charts with #Python and @matplotlib ?

Join me and @joseph_barbier for a brand new #dataviz workshop!

We’ll spend 2 half-days together, alternating between impactful explanations and hands-on exercises.

Only 15 spots available!

https://t.co/2HytHSWqwm

[Yan Holtz @R_Graph_Gallery]

@canermaker Keen to give it a go, please tell me when you're releasing it!

[Yan Holtz @R_Graph_Gallery]

Want to improve your #dataviz design eye?

➡️ I just released a little game:

You have to spot the better version of a chart and learn the fundamental concepts along the way.

https://t.co/bI1MERgPyf

What's your score!? 😀

[Yan Holtz @R_Graph_Gallery]

@canermaker original pictures are from Diana MacDonald

I then created degraded versions, using my own experience of common design caveats.

Then created the online quiz =)

[Yan Holtz @R_Graph_Gallery]

@kongharald Thanks @kongharald , what url did you use?

[Yan Holtz @R_Graph_Gallery]

@Vitvitsky I see what you mean. Thanks for the feedback!

[Yan Holtz @R_Graph_Gallery]

@chandraseptiaan Not bad!

[Yan Holtz @R_Graph_Gallery]

@robcrock @d3js_org Yay!! Congrats! :)

[Yan Holtz @R_Graph_Gallery]

❌ Made a list of the 37 most common #dataviz caveats

- Rank your groups
- what's wrong with boxplots
- Dual Y axes
- overplotting
- misleading error bars
...

➡️ https://t.co/elGnMswssl

I'll use in my https://t.co/sCU4unfXJY and https://t.co/HxJb2xar9Z

Any I should add?

[Yan Holtz @R_Graph_Gallery]

#dataviz is a long, iterative process.

If you want to learn the required steps to create a great graph with R and ggplot2,

we are building something for you with @CedScherer !

https://t.co/HxJb2xar9Z

[Yan Holtz @R_Graph_Gallery]

@GueyeNono @CedScherer Works for me. DM you now

[Yan Holtz @R_Graph_Gallery]

😀🍾 Big, big news!! 🎉😱

➡️ I'm starting a new #dataviz project with @CedScherer

It's an interactive online course designed to turn you into a ggplot2 dataviz expert!

➡️ https://t.co/HxJb2xar9Z

Pre-launch until Sunday. If you like making charts with R, you'll love it!

[Yan Holtz @R_Graph_Gallery]

@GueyeNono @CedScherer Checking now