Hello,
This type of problem is almost always a data reshaping problem.
ggplot graphics work better if the data is in the long format and you
have 3 columns for counts, one column for each category. If you reformat
from the current wide format to the long format you will have a date
vector, a categorical variable and a counts variable.
In the code below just change geom_point to geom_line and the problem is
solved.
library(tidyverse)
library(lubridate)
datO <- read.csv("https://api.covidtracking.com/v1/states/oh/daily.csv")
datO[ ,1] <- ymd(datO[ ,1])
dfO <- tibble::as_tibble(data.frame(date = datO[ ,"date"],
??????????????????????????????????? positive = datO[ ,"positive"],
??????????????????????????????????? negative = datO[ ,"negative"],
??????????????????????????????????? total = datO[ ,"total"]))
dfO %>%
? pivot_longer(
??? cols = -date,
??? names_to = "cases",
??? values_to = "count"
? ) %>%
? mutate(cases = factor(cases, levels = c("positive", "negative",
"total"))) %>%
? ggplot(aes(date, count, color = cases)) +
? geom_point() +
? scale_color_manual(name = "Test",
???????????????????? labels = c("Positive", "Negative", "Total"),
???????????????????? values = c("red", "blue", "green")) +
? ylim(0, 1750000) +
? labs(x = "Date", y = "Number of Tests")+
? ggtitle("COVID-19 Tests in Ohio \n (8/15/20)")+
? theme_bw() +
? theme(axis.text.x = element_text(angle = 30, hjust = 1),
??????? plot.title = element_text(hjust = 0.5))
Hope this helps,
Rui Barradas
?s 02:00 de 17/08/20, Stephen P. Molnar escreveu:
I have cobbled together a short script to plot Covid-19 data.
setwd("~/Apps/Models/1-CoronaVirus")
library(tidyverse)
library(lubridate)
datO <- read.csv("https://api.covidtracking.com/v1/states/oh/daily.csv")
datO[ ,1] <- ymd(datO[ ,1])
dfO <- tibble::as_tibble(data.frame(datO[ ,"date"],datO[
,"positive"],datO[ ,"negative"],datO[ ,"total"]))
dfO %>%
?? ggplot(aes(x = datO[ ,"date"],y = datO[ ,"positive"]))+
?? geom_point(color = 'red', size = 0.025)+
?? geom_point(y = datO[ ,"negative"], color = 'blue', size = 0.025)+
?? geom_point(y = datO[ ,"total"], color = "green", size = 0.025)+
?? theme(axis.text.x = element_text(angle=30, hjust=1))+
?? theme_bw()+
?? scale_y_continuous(limits = c(0,1750000))+
?? labs(x = "Date", y = "Number of Tests")+
?? ggtitle("COVID-19 Tests in Ohio \n (8/15/20)")+
?? theme(plot.title = element_text(hjust = 0.5))+
?? scale_fill_discrete(name = "Test", labels = c("Positive",
"Negative", "Total"))
Here is the plot:
but, if I want lines rather that the code (the aspplicable plines) uis:
ggplot(aes(x = datO[ ,"date"],y = datO[ ,"positive"]))+
?? geom_line(linetype = "solid",color = 'red')+
?? geom_line(linetype = "dotdash",y = datO[ ,"negative"], color =
'blue')+
?? geom_line(linetype = "twodash",y = datO[ ,"total"], color = "green")+
Now two of the plots are reversed. Google has not been a friend in
finding a solution.
Help will be much appreciated.
Thanks in advance