How can I plot a line for one country throughout time via ggplot?-CodePudding

My code is

ggplot(classen, aes(x=Year, y=, colour= class))   geom_line()

My df is:

Country Name	Year	SupDem
Turkiye	1990	5
Turkiye	1991	45
Turkiye	1993	50
US	1990	80
US	1991	85
US	1993	84

I need to choose the country's name and then want to plot it, but I am not sure if I can choose the country within the ggplot() function.

CodePudding user response：

Yes, the color should be Country Name rather than class, and y should be SupDem

library(ggplot2)

ggplot(df, aes(Year, SupDem, colour = `Country Name`))  
  geom_line()

Or, if you want more modern styling, something like:

library(ggplot2)

ggplot(df, aes(Year, SupDem, colour = `Country Name`))  
  geom_line(size = 1)  
  geom_point(size = 3)  
  scale_color_manual(values = c('orange', 'deepskyblue4'))  
  theme_minimal(base_size = 16)

EDIT

To add the mean value to the plot, we can do:

ggplot(df, aes(Year, SupDem))  
  geom_line(aes(colour = `Country Name`), size = 1)  
  geom_point(aes(colour = `Country Name`), size = 3)  
  geom_line(stat = 'summary', fun = mean, aes(color = 'mean'), linetype = 2)  
  scale_color_manual(values = c('gray', 'orange', 'deepskyblue4'))  
  theme_minimal(base_size = 16)

^{Created on 2022-10-04 with reprex v2.0.2}

Data taken from question in reproducible format

df <- structure(list(`Country Name` = c("Turkiye", "Turkiye", "Turkiye", 
 "US", "US", "US"), Year = c(1990L, 1991L, 1993L, 1990L, 1991L, 
1993L), SupDem = c(5L, 45L, 50L, 80L, 85L, 84L)), class = "data.frame", 
row.names = c(NA, -6L))