Using element_ Textcustomize text in ggplot2

Ggplot2’s theme system allows us to better control graphicsNon data elementTo enhance the beauty of the image through more subtle modifications,Theme system of ggplot2Self contained multipleelement_function

• element_text( )
• element_line( )
• element_rect( )
• element_blank( )

This section describes the topic element element_ Text (), which controls many parts of text elements in a drawing, such as font size, color, and font type.

Element of ggplot2_ Text() parsing

element_ List of elements controlled by text()

• axis. title. x: Custom X-axis label / Title
• axis. title. Y: Custom Y-axis label / Title
• axis. text. X: Custom X-axis scale labels
• axis. text. Y: Custom Y-axis scale labels
• legend. Title: custom legend title text
• legend. Text: Custom legend text
• plot. Title: custom image main title
• plot. Subtitle: custom image subtitle
• plot. Caption: custom image footnotes
• plot. Tag: custom drawing labels

Load R package

library(tidyverse)
library(palmerpenguins)

Still use the penguin data set. Next, use element_ Text() function to adjust the text element of the image

p<- penguins %>%
  drop_na() %>%
  ggplot(aes(x=flipper_length_mm,
             y=bill_length_mm, 
             color=species,
             shape=sex))+
  geom_point()+
  labs(title="Palmer Penguins",
       subtitle="Flipper Length vs Bill Length",
       caption="cmdlinetips.com",
       tag = 'A'
  )

p

1. axis. title.* (): Customx&yLabel text

Through element_ Text() to change the text, color, size and angle

p + theme(axis.title.x = element_text(size=16, color="purple", 
                                      face="bold",angle=0),
          axis.title.y = element_text(size=16, color="purple", 
                                      face="bold",angle=90))

2. axis. text.* () customx&yScale text

p + theme(axis.text.x=element_text(family = "Tahoma",face="bold",
                                   colour="black",size=10),
          axis.text.y = element_text(family = "Tahoma",face="bold",
                                     colour="black",size=10))

3. legend. Title() custom legend title text

p + theme(legend.title=element_text(color="purple",
                                    face="bold",size=12))

4. legend. Text() custom legend text

p + theme(legend.text=element_text(face="bold", color="red",size=10))

5. plot. Title() custom main title

p + theme(plot.title= element_text(size=15,color="blue",hjust = 0.5,
                                   face="bold",family = "Tahoma"))

6. plot. Subtitle() custom subtitle

p + theme(plot.subtitle= element_text(size=13,
                                      color="red",
                                      face="bold"))

7. plot. Caption() custom footnote

p + theme(plot.caption= element_text(size=12,
                                     color="blue",
                                     face="bold"))

8. plot. Tag() custom label

p + theme(plot.tag = element_text(size=16,
                                   color="red",
                                   face="bold"))

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