Change how default colors are defined

[bmacGTPM]

Probably want to modify this way?

options(ggplot2.continuous.colour="viridis")
options(ggplot2.continuous.fill = "viridis")
options(ggplot2.discrete.fill = blah)
options(ggplot2.discrete.color = whatevs)

Also, want an easy way to restore ggplot defaults.

[bmacGTPM]

https://data-se.netlify.app/2018/12/12/changing-the-default-color-scheme-in-ggplot2/

https://stackoverflow.com/questions/10504724/change-the-default-colour-palette-in-ggplot

tidyverse/ggplot2#3833

[bmacGTPM]

From https://ggplot2-book.org/scale-colour.html

Default for scale_fill_continuous() is scale_fill_gradient() and default colors can be found in the help file

scale_fill_gradient(
  ...,
  low = "#132B43",
  high = "#56B1F7",
  space = "Lab",
  na.value = "grey50",
  guide = "colourbar",
  aesthetics = "fill"
)

The default scale for discrete colours is scale_fill_discrete() which in turn defaults to scale_fill_hue() so these are identical plots:

bars
> bars + scale_fill_discrete()
> bars + scale_fill_hue()

[bmacGTPM]

done for discrete. will do continuous later if necessary