Using multiple scale_colour_gradient scales for different ranges of the data in one plot

Question

I am very new to R so please bear with me if something is not clear in my question.

I have a data.frame \"protein\" with 5 columns, namely;

1.prote

Answer 1

For this type of thing you want to use scale_gradientn. For example:

library(ggplot2)

x = seq(-0.1, 0.1, len=100)
y = 0:10
dat = expand.grid(x=x, y=y)

ggplot(data=dat, aes(x=x, y=y, fill=x)) +
  geom_raster() +
  scale_fill_gradientn(colours=c('red', 'yellow', 'cyan', 'blue'),
    values   = c(-0.05,-1e-32,1e-32,0.05),
    breaks   = c(-0.05,-0.005,0.005,0.05),
    rescaler = function(x,...) x,
    oob      = identity)