CODEWITHSUNDEEP
rggplot2bar-chartstacked-chart
DaltonicD
DaltonicD

Reputation: 75

How to use ggplot2 to create a stacked bar chart of three variables (not categories!)?

I have a dataframe with data of the daily evolution of the coronavirus with 4 columns: date, active cases, deaths and recoveries. Since the sum of these 3 last values is equal to the total number of cases, I want a bar chart where each day has a corresponding bar divided in 3 parts: active cases, deaths and recoveries. How do I do this with ggplot? Thank you in advance

Upvotes: 0

Views: 266

Answers (1)

dc37
dc37

Reputation: 16178

A possible way is to reshape your dataframe into a longer format using pivot_longer function for example in order to fit the use with ggplot2.

As an example with a fake dataset:

library(lubridate)
df <- data.frame(date = seq(ymd("2020-01-01"),ymd("2020-01-10"),by = "day"),
                 active = sample(10:100,10),
                 death = sample(10:100,10),
                 recov = sample(10:100,10))

library(dplyr)
library(tidyr)
library(ggplot2)

df %>% pivot_longer(-date, names_to = "case", values_to = "val") %>%
  mutate(case = factor(case, levels = c("active","recov","death"))) %>%
  ggplot(aes(x = date, y = val, fill = case))+
  geom_col(position = position_stack(reverse = TRUE))

enter image description here

Does it answer your question ?

If not, please provide a reproducible example of your dataset by following this guide: How to make a great R reproducible example and the code you have try so far.

Upvotes: 1

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