geom point scale_colour_gradient2

[Alina Vodonos Zilberg]

Hi!

I am trying to change the color of the geom_point in my plot for the
variable -concentration

summary(dat$concentration) Min. 1st Qu. Median Mean 3rd Qu. Max.
0.5502 5.2628 12.2493 21.4695 27.4057 205.3170


mp <- NULL
mapWorld <- borders("world", colour="black", fill="white") # create a layer
of borders
mp <- ggplot() + mapWorld
mp

m1<-mp+ geom_point(data=dat, aes(x=lon,
y=lat,color=concentration),alpha=0.6, size=2.5)+
scale_colour_gradient2("concentration levels", low = "seashell1", mid =
"lightsalmon3",
high = "tomato4", midpoint = 21, space = "Lab",
na.value = "grey50", guide = "colourbar")
m1


I want it to look something like that


Any ideas?

thank you!
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[Brandon Hurr]

Alina,

Do you have some sample data that we could use to make a similar graph? I
don't do a lot of mapping so it's really hard for me to make up an example
here.

If you could make a reproducible example as described in the bottom of this
email it would help us help you.

Thanks,
B

On Tue, Mar 6, 2018 at 9:07 AM, Alina Vodonos Zilberg <

Post by Alina Vodonos Zilberg
Hi!
I am trying to change the color of the geom_point in my plot for the
variable -concentration
summary(dat$concentration) Min. 1st Qu. Median Mean 3rd Qu. Max.
0.5502 5.2628 12.2493 21.4695 27.4057 205.3170
mp <- NULL
mapWorld <- borders("world", colour="black", fill="white") # create a
layer of borders
mp <- ggplot() + mapWorld
mp
m1<-mp+ geom_point(data=dat, aes(x=lon, y=lat,color=concentration),alpha=0.6,
size=2.5)+
scale_colour_gradient2("concentration levels", low = "seashell1", mid =
"lightsalmon3",
high = "tomato4", midpoint = 21, space = "Lab",
na.value = "grey50", guide = "colourbar")
m1
I want it to look something like that
Any ideas?
thank you!
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Please provide a reproducible example: https://github.com/hadley/
devtools/wiki/Reproducibility
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