I've read an interesting statement on #DataViz today: "Only sequential colour-gradient types can be faithfully applied to categorical types of data in form of categorical colour palettes."
(source: https://s-ink.org/colour-palette-and-gradient-types by ISSI's Fabio Crameri)
-- anybody can point to to any research etc. supporting or refuting this?
@sojournTime cools, thanks! If I understand the first of the above papers correctly, it actually shows that true categorical palettes are more effective, so the above statement is wrong.
@vicgrinberg I think the link and quote you provided are kind of weird in that the author wants to categorize everything as a type of gradient color scheme and so is forced to make categorical color palettes a sequential gradient when in reality they're not.
@sojournTime agreed! Which is why I asked around here, I was wondering whether I am missing something...