I am trying to plot a rasterstack with a color scheme of red to blue with white in the centre. This is my code:
plot2<-diverge0(rasterstack, ramp='RdBu')
But when the stack is plotted, the colors are very light in shade. I would like to incorporate the code of 'colorspace' of :
darken(col, amount = 0.1, space = "combined")
How can I make the color palette obtained from diverge0 to be darker?
The below code is what I currently came up with
plot2<-diverge0(rasterstack, ramp='RdBu',darker=0.4)
which results in an error.
It is unclear where the diverge0()
function comes from. If it is the one from https://gist.github.com/johnbaums/306e4b7e69c87b1826db , then it seems that you can do (disclaimer: untested):
diverge0(rasterstack,
ramp = colorRampPalette(
darken(brewer.pal(11, "RdBu"), amount = 0.1, space = "combined")
)
)
Note that rather than going through RColorBrewer
first and then tweaking the result afterwards you could also play with the parameters of divergingx_hcl(11, "RdBu")
or diverging_hcl(11, "Blue-Red 3", rev = TRUE)
. For example, you could replace the code from the third code line above ( darken(...)
) with either
divergingx_hcl(11, palette = "RdBu", l2 = 85, cmax1 = 90)
or
diverging_hcl(11, "Blue-Red 3", rev = TRUE, l2 = 85)
Both make the luminance of the central gray somewhat darker ( l2 = 85
) with the former also limiting the maximum chroma (which is always lower with the latter anyway).
In the latter case you can also register your custom palette with a new name, eg,
diverging_hcl(11, "Blue-Red 3", l2 = 85, register = "Dark Blue-Red")
diverging_hcl(11, "Dark Blue-Red", rev = TRUE)
## [1] "#5F1415" "#953535" "#BB6060" "#CF8D8E" "#D9B6B6" "#D4D4D4" "#B6BED7"
## [8] "#8C9ECE" "#577AC1" "#1554A4" "#002F70"
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