Stacked barchart - R programming with ggplot2

Question

I want to create a stacked bar chart (using any library like ggplot2) for the below data format.

sno  type  state
t1  type1   A
t2  type2   C
t3  type3   A
t4  type1   B
t5  type3   B
t6  type3   B
t7  type3   C
t8  type2   A
t9  type2   C
t10 type2   B

Want to render chart with 'state' on X-axis and 'type' on y axis

Answer 1

Use ggplot2 to map the variables to the aesthetics just as you described. You don't want type on the y-axis - you want type on another axis, in this case fill for stacks of different colors. The default y aesthetic for a bar plot is count.

library(ggplot2)

mydata <- read.csv(
  text = "s no,type,state
  t1,type1,A
  t2,type2,C
  t3,type3,A
  t4,type1,B
  t5,type3,B
  t6,type3,B
  t7,type3,C
  t8,type2,A
  t9,type2,C
  t10,type2,B")
ggplot(mydata, aes(x = state, fill = type)) + 
  geom_bar()

Answer 2

Use position = stack inside geom_bar()

ggplot(mydata, aes(x = state, fill/color = type)) + geom_bar(position = "stack")