Why I cannot add colours to my bar chart in Rstudio?

Question

I used the code below but it only shows charts with no color

gbar <- ggplot(data=episode_data, aes(x=season))
gbar + 
   geom_bar() +
   scale_fill_brewer(type = "seq", palette = 1, direction = 1, aesthetics = "fill") 

Answer 1

As no data is provided, I will explain you two way to add color in a plot using demo data iris. You can set the aesthetic element fill in order to add some variable to fill your bars. The output of a code using that option would be next:

library(ggplot2)
library(tidyverse)
#Data
data("iris")
#Example 1 color by species
iris %>% pivot_longer(-Species) %>%
  ggplot(aes(x=name,y=value,fill=Species))+
  geom_bar(stat='identity')

Output:

The second option would be directly enable fill option inside geom_bar() with some defined color like this:

#Examples 2 only one color
iris %>% pivot_longer(-Species) %>%
  ggplot(aes(x=name,y=value))+
  geom_bar(stat='identity',fill='cyan3')

Output:

For the code you added try this, and next time please include a sample of your data to reproduce your issue:

#Option 1
ggplot(data=episode_data, aes(x=season))+
  geom_bar(stat='identity',fill='red')
#Option 2
ggplot(data=episode_data, aes(x=season,fill=factor(season)))+
  geom_bar(stat='identity')