Change Color of ggplot2 Boxplot in R (3 Examples) | Set col & fill in Plot | Manually Specify Colors

R code of this video:

group = letters[1:5])

library("ggplot2")

ggplot(data, aes(x = group, y = value)) + # ggplot2 boxplot without colors
geom_boxplot()

ggplot(data, aes(x = group, y = value, col = group)) + # Change color of borders
geom_boxplot()

ggplot(data, aes(x = group, y = value, fill = group)) + # Change filling color
geom_boxplot()

ggplot(data, aes(x = group, y = value, fill = group)) + # Manually specified filling color
geom_boxplot() +
scale_fill_manual(breaks = data$group,
values = c("#1b98e0", "#353436", "yellow", "red", "green"))

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[haraldurkarlsson]

Nice - I like the approach of using a) multiple ways of generating the same result and/or b) showing the incredible flexibility of packages like ggplot2 (which is virtually limitless).

[abigailspencer]

I get an error when trying to do that last example, stating "scale for 'fill' is already present. This is what it looks like:

```
ggplot(data = TOOTH, mapping = aes(x = dose, y = len)) +
geom_boxplot() +
xlab("Dosage") +
ylab("Length") +
labs(title = "Supplement Dosage on Teeth") +
scale_fill_discrete(name = "Supplement") +
scale_fill_manual(breaks = TOOTH$supp, values = "#990000"))

```
any ideas?

[abhilashpatel]

Can you please help me to use the new colour by the rgb code or hex code which is not available in default R environment

[roxirisauxiliadora]

Great! but it seems that your manually filling does not work in my r, it only changes the color of the first box. Any idea of what is wrong?

[newcomer]

Great video as usual.
I have one question! How can we omit legend in the plot?