scale for plotting separate color gradients for positive and negative values
scale_fill_bisided(
name = ggplot2::waiver(),
neg_scale = scale_fill_distiller(palette = "Blues", direction = 1),
pos_scale = scale_fill_distiller(palette = "Reds"),
symmetric = TRUE
)a ggplot2 scale of type ScaleContinuous that includes negative and positive fill
scales internally in the $neg_scale and $pos_scale elements
the scale name to be printed in the legend (above positive scale)
a scale_fill_* object used for negative values
a scale_fill_* object used for positive values
if TRUE, the limits of the positive scale will equal the inverse limits of the negative scale. Said differently, this makes the positive and negative scales symmetric
Note that this will absolutely not work as a general purpose ggplot2 scale! The positive/negative combination is achieved by adding two layers/geoms behind the scenes with different color scale.