New palettes mako, rocket, turbo (CVD?)

sjmgarnier / viridis

Colorblind-Friendly Color Maps for R

http://sjmgarnier.github.io/viridis

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New palettes mako, rocket, turbo (CVD?) #77

Open modche opened 3 years ago

modche commented 3 years ago

Hi there, nice package, nice color maps! I also appreciated the update with the nice palettes mako and rocket. However, perhaps it would be good to comment on turbo a little bit more: Is this colormap considered to be perceptually uniform and therefore recommended? As far as I can judge this the lightness gradient of turbo is a) not linear and b) has different slopes on both edges.

Would be good to have a statement on turbo, e.g., for people with CVD.

Thanks a lot. Michael

sjmgarnier commented 3 years ago

@modche This is a good point. The info is there in ?viridis.map (see the description and the link in reference), but we could make it more prominent in the next update. I'll keep this issue open as a reminder.

modche commented 3 years ago

Ok, thanks. Yes, would be good to have this more prominent. Perhaps it is possible to show the lightness gradients such as shown on https://ai.googleblog.com/2019/08/turbo-improved-rainbow-colormap-for.html.

sjmgarnier commented 3 years ago

@modche That shouldn't be too difficult. I don't know when the next CRAN update will be (the package has so many reverse dependencies now, it's a pain to prepare CRAN updates), but I can try to add that in the dev version as soon as work gives me an opportunity. Or if you have time to prepare a PR for the dev branch, I can review it once it's ready.

modche commented 3 years ago

Perhaps there is a misunderstanding, sorry. I suggest to have on the github page and also directly in the package help files a comment on potential issues of the turbo color map. However, it is possible to analyze the color maps with the colorsapce package.