scale_colour_gradient2. ggplot2 0.9.3.1Usage scale_colour_gradient2(..., low = muted("red"), mid = "white", high = muted("blue"), midpoint = 0, space = "rgb", na.value = "grey50", guide = "colourbar") scale_fill_gradient2(..., low = muted("red"), mid = "white", high = muted("blue"), midpoint = 0, space = "rgb", na.value = "grey50", guide = "colourbar") scale_color_gradient2(..., low = muted("red"), mid = "white", high = muted("blue"),
