Easy methods to Exchange Line of Pieces in ggplot2 Legend

You’ll be able to usefulness please see syntax to modify the sequence of the pieces in a ggplot2 legend:

scale_fill_discrete(breaks=c('item4', 'item2', 'item1', 'item3', ...)

Refer to instance displays the best way to usefulness this syntax in apply.

Instance: Exchange Line of Pieces in ggplot2 Legend

Assume we assemble please see plot in ggplot2 that presentations more than one boxplots in a single plot:

library(ggplot2)

#assemble knowledge body
df <- knowledge.body(staff=c('A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'C', 'C', 'C', 'C'),
                 issues=c(6, 8, 13, 16, 10, 14, 19, 22, 14, 18, 24, 26))

#assemble more than one boxplots to visualise issues scored via staff
ggplot(knowledge=df, aes(x=staff, y=issues, fill=staff)) +
  geom_boxplot()

To switch the sequence of the pieces within the legend, we will usefulness the scale_fill_discrete() serve as as follows:

library(ggplot2)

#assemble knowledge body
df <- knowledge.body(staff=c('A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'C', 'C', 'C', 'C'),
                 issues=c(6, 8, 13, 16, 10, 14, 19, 22, 14, 18, 24, 26))

#assemble more than one boxplots to visualise issues scored via staff
ggplot(knowledge=df, aes(x=staff, y=issues, fill=staff)) +
  geom_boxplot() +
  scale_fill_discrete(breaks=c('B', 'C', 'A'))

Understand that the sequence of the pieces modified from: A, B, C to B, C, A.

We will additionally usefulness the labels argument to modify the precise labels old for the pieces within the legend:

library(ggplot2)

#assemble knowledge body
df <- knowledge.body(staff=c('A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'C', 'C', 'C', 'C'),
                 issues=c(6, 8, 13, 16, 10, 14, 19, 22, 14, 18, 24, 26))

#assemble more than one boxplots to visualise issues scored via staff
ggplot(knowledge=df, aes(x=staff, y=issues, fill=staff)) +
  geom_boxplot() +
  scale_fill_discrete(breaks=c('B', 'C', 'A'),
                      labels=c('B Staff', 'C Staff', 'A Staff'))

Understand that the legend labels have modified.

Spare Assets

Refer to tutorials give an explanation for the best way to carry out alternative familiar operations in ggplot2:

Easy methods to Take away a Legend in ggplot2
Easy methods to Exchange Legend Place in ggplot2
Easy methods to Exchange Legend Measurement in ggplot2
Easy methods to Exchange the Legend Identify in ggplot2