A Whole Information to the Default Colours in ggplot2

The ggplot2 package deal has an inventory of default colours that it makes use of for the weather in a plot relying at the choice of general components.

For instance, refer to code displays how one can build a bar plot with 3 bars:

library(ggplot2)

#build information body
df <- information.body(crew=c('A', 'B', 'C'),
                 issues=c(22, 28, 15))

#build bar plot the use of df
ggplot(df, aes(x=crew, y=issues, fill=crew)) +
  geom_bar(stat = "id")

By way of default, ggplot2 chooses to utility a particular silhoutte of crimson, inexperienced, and blue for the bars.

We will utility the hue_pal() from the scales package deal to take out the latest hex colour codes worn within the plot:

library(scales)

#take out hex colour codes for a plot with 3 components in ggplot2 
hex <- hue_pal()(3)

#show hex colour codes
hex

[1] "#F8766D" "#00BA38" "#619CFF"

Right here’s how one can interpret the output:

• The hex colour code for the crimson within the plot is #F8766D.
• The hex colour code for the golf green within the plot is #00BA38.
• The hex colour code for the blue within the plot is #619CFF.

We will utility additionally utility show_col() from the scales package deal to overlay the hex colour codes on their latest colours:

library(scales)

#take out hex colour codes for a plot with 3 components in ggplot2 
hex <- hue_pal()(3)

#overlay hex colour codes on latest colours
show_col(hex)

And we will utility refer to code to build a plot that displays the default ggplot2 colours for plots with one thru 8 components:

library(scales)

#eager margins of plot branch
par(mai = c(0.1, 0, 0.1, 0), bg = "grey85")

#build plot with ggplot2 default colours from 1 to eight
gc.grid <- line(matrix(1:8, nrow = 8))
for(i in 1:8){
   gc.ramp <- hue_pal()(i)
   plot(c(0, 8), c(0,1),
        kind = "n", 
        bty="n", 
        xaxt="n", 
        yaxt="n", xlab="", ylab="")
   for(j in 1:i){
      rect(j - 1, 0, j - 0.25, 1, col = gc.ramp[j])
   }
}

And we will utility refer to code to show the hex colour codes for every colour proven within the plot:

library(scales)

#show ggplot2 default hex colour codes from 1 to eight
for(i in 1:8){
  print(hue_pal()(i))
}

[1] "#F8766D"
[1] "#F8766D" "#00BFC4"
[1] "#F8766D" "#00BA38" "#619CFF"
[1] "#F8766D" "#7CAE00" "#00BFC4" "#C77CFF"
[1] "#F8766D" "#A3A500" "#00BF7D" "#00B0F6" "#E76BF3"
[1] "#F8766D" "#B79F00" "#00BA38" "#00BFC4" "#619CFF" "#F564E3"
[1] "#F8766D" "#C49A00" "#53B400" "#00C094" "#00B6EB" "#A58AFF" "#FB61D7"
[1] "#F8766D" "#CD9600" "#7CAE00" "#00BE67" "#00BFC4" "#00A9FF" "#C77CFF" "#FF61CC"

Supplementary Assets

Please see tutorials give an explanation for how one can carry out alternative regular operations in R:

A Whole Information to the Easiest ggplot2 Topics
Exchange Legend Dimension in ggplot2
Take away a Legend in ggplot2