Added two section to the Walkthrough

[elliesch]

Hi @dhuppenkothen ,

I added two sections to the data viz walkthrough, and I'd love to hear your comments!

Cheers, Ellie

[dhuppenkothen]

Love it! :)

Just a couple of comments/questions:

• we probably don't want to commit the ipynb-checkpoint file?
• the two images embedded in the notebook (the original visualization and the colour blindness example don't show up in the rendered version here. Do we maybe need to include those images separately in the repo and link them?
• for cell 15 (the varying colours of bars), it's not quite clear to me what the overall message is. Do we think changing intensity on the bar chart is a good idea? If so, what information does the additional dimension communicate? Is the idea with the changing intensity to give people a chance to compare and pick an intensity they like? It might be worth being a little more specific here?

[elliesch]

Awesome! 😁

I'm not sure how to un-checkpoint the notebook, but I pushed a new version with updates and no second checkpoint. If I figure out un-checkpointing, I'll push that one instead.

I added the embedded images and reworded the section with color as another dimension. I've only added it since in some plots color as another dimension can be really handy, but I'm not sure that it is in this one. If it still doesn't work well, we can definitely remove it!