如何在 R 中 plot 多折线图

Question

I have to create a plot with the number of COVID-19 confirmed cases by date, in each country. I have to use the data inside the package: https://cran.r-project.org/web/packages/coronavirus/index.html .

I managed to create a subset with the variables "Country Region", "Type" (confirmed only), "date", and "total of cases". However, i don't know to plot a graph with multiple lines.

I have to plot a graph with all countries in it, based on the: https://twitter.com/thomasfujiwara/status/1249817958874001412?s=20

I also want to exclude mainland china from the dataset

Can someone help me?

Answer 1

It's very difficult to help without a reproducible example, but one way would be to use ggplot2 . You can use either the group or the color aesthetic in your plot:

library(coronavirus)
library(dplyr)
library(ggplot2)
data(coronavirus)

coronavirus %>%
    filter(type == "confirmed") %>%
    filter(Country.Region != "Mainland China") %>% 
    group_by(Country.Region, date) %>%
    summarise(total = sum(cases)) %>% 
    ggplot(aes(x = date, y = total, color = Country.Region)) + 
    geom_line()