My axis labels on a column graph are unreasonably long. Initially, I addressed this via stringr thanks to dibisan’s solution on an existing question which allowed me to truncate the labels using the following code:
ig_plot + scale_x_discrete(label = function(x) str_trunc(x, width = 40)) +
theme(axis.text.x = element_text(angle = 45, hjust = 1, vjust = 1))
I then decided that I wanted to show more characters, and found Sandy Muspratt’s solution to an existing question, using str_wrap:
ig_plot + scale_x_discrete(label = function(x) str_wrap(x, width = 30)) +
theme(axis.text.x = element_text(angle = 45, hjust = 1, vjust = 1))
This second plot is more similar to what I want to display. However, it has too many characters. I want to wrap the labels so that each label is 2 lines of 30 characters, followed by ellipses representing excess characters.
I have tried combining both str_trunc and str_wrap within the scale_x_discrete function as below:
ig_plot + scale_x_discrete(label = function(x) str_wrap(x, width = 30),
str_trunc(x,60)) +
theme(axis.text.x = element_text(angle = 45, hjust = 1, vjust = 1))
This does not work and generates the error: Error in str_trunc(x, 60) : object 'x' not found.
I had also tried combining as a separate geom, but this results only in the truncation:
ig_plot + scale_x_discrete(label = function(x) str_wrap(x, width = 30)) +
scale_x_discrete(label = function(x) str_trunc(x, width = 60)) +
theme(axis.text.x = element_text(angle = 45, hjust = 1, vjust = 1))
Can someone please help write an expression to truncate to 60 characters, while line-breaking at 20? Ideally using stringr (though other solutions appreciated too!).
Code for ig_plot:
ig_plot <- ggplot(ig_protein_long,
aes(x = Protein.names,
y = Abundance,
fill = Sample)) +
geom_col(position = "dodge2")
Data:
Protein.names Protein.Names2 Sample Abundance
<chr> <chr> <chr> <dbl>
1 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN 2_1A 5864380
2 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN 2_1A_deglycos 4048260
3 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN 2_1D 5688230
4 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN 2_1D_deglycos 3701410
5 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN AED5 8264160
6 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN AED5_deglycos 7439780
7 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN AI5 1189120
8 Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE) IGHG1_HUMAN AI5_deglycos 1179410
9 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN 2_1A 625329
10 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN 2_1A_deglycos 717111
11 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN 2_1D 592491
12 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN 2_1D_deglycos 651356
13 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN AED5 NA
14 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN AED5_deglycos 203275
15 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN AI5 NA
16 Immunoglobulin heavy constant gamma 3 (HDC) (Heavy chain disease protein) (Ig gamma-3 chain C region) IGHG3_HUMAN AI5_deglycos NA
17 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN 2_1A 957383
18 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN 2_1A_deglycos 804135
19 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN 2_1D 984904
20 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN 2_1D_deglycos 645221
21 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN AED5 2239410
22 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN AED5_deglycos 2265830
23 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN AI5 283809
24 Immunoglobulin heavy constant gamma 4 (Ig gamma-4 chain C region) IGHG4_HUMAN AI5_deglycos 176392
25 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN 2_1A 1819170
26 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN 2_1A_deglycos 1617100
27 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN 2_1D 1904510
28 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN 2_1D_deglycos 1260750
29 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN AED5 7667500
30 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN AED5_deglycos 7660800
31 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN AI5 366542
32 Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU) IGHM_HUMAN AI5_deglycos 494940
33 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN 2_1A 38816100
34 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN 2_1A_deglycos 25503900
35 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN 2_1D 42940400
36 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN 2_1D_deglycos 23146300
37 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN AED5 114771000
38 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN AED5_deglycos 105117000
39 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN AI5 56312200
40 Immunoglobulin heavy constant alpha 1 (Ig alpha-1 chain C region) (Ig alpha-1 chain C region BUR) (Ig alpha-1 chain C region TRO) IGHA1_HUMAN AI5_deglycos 56323800
41 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN 2_1A 6839840
42 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN 2_1A_deglycos 3586850
43 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN 2_1D 5939300
44 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN 2_1D_deglycos 3094120
45 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN AED5 26295900
46 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN AED5_deglycos 26165000
47 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN AI5 6706120
48 Immunoglobulin heavy constant alpha 2 (Ig alpha-2 chain C region) (Ig alpha-2 chain C region BUT) (Ig alpha-2 chain C region LAN) IGHA2_HUMAN AI5_deglycos 5510820
>Solution :
To achieve your desired result wrap str_trunc inside str_wrap like so:
df <- data.frame(
Protein.names = c(
"Immunoglobulin heavy constant gamma 1 (Ig gamma-1 chain C region) (Ig gamma-1 chain C region EU) (Ig gamma-1 chain C region KOL) (Ig gamma-1 chain C region NIE)",
"Immunoglobulin heavy constant mu (Ig mu chain C region) (Ig mu chain C region BOT) (Ig mu chain C region GAL) (Ig mu chain C region OU)"
)
)
library(ggplot2)
library(stringr)
ggplot(df, aes(Protein.names)) +
geom_bar() +
scale_x_discrete(label = function(x) str_wrap(str_trunc(x, 60), width = 30)) +
theme(axis.text.x = element_text(angle = 45, hjust = 1, vjust = 1))
