i need your help. I was trying to do a stacked bar plot in R and i m not succeding for the moment. I have read several post but, no succed neither.
Like i am newbie, this is the chart I want (I made it in excel)
And this is how i have the data
Thank you in advance
I would use the package ggplot2 to create this plot as it is easier to position text labels than compared to the basic graphics package:
# First we create a dataframe using the data taken from your excel sheet:
myData <- data.frame(
Q_students = c(1000,1100),
Students_with_activity = c(950, 10000),
Average_debt_per_student = c(800, 850),
Week = c(1,2))
# The data in the dataframe above is in 'wide' format, to use ggplot
# we need to use the tidyr package to convert it to 'long' format.
library(tidyr)
myData <- gather(myData,
Condition,
Value,
Q_students:Average_debt_per_student)
# To add the text labels we calculate the midpoint of each bar and
# add this as a column to our dataframe using the package dplyr:
library(dplyr)
myData <- group_by(myData,Week) %>%
mutate(pos = cumsum(Value) - (0.5 * Value))
#We pass the dataframe to ggplot2 and then add the text labels using the positions which
#we calculated above to place the labels correctly halfway down each
#column using geom_text.
library(ggplot2)
# plot bars and add text
p <- ggplot(myData, aes(x = Week, y = Value)) +
geom_bar(aes(fill = Condition),stat="identity") +
geom_text(aes(label = Value, y = pos), size = 3)
#Add title
p <- p + ggtitle("My Plot")
#Plot p
p
so <- data.frame ( week1= c(1000,950,800), week2=c(1100,10000,850),row.names = c("Q students","students with Activity","average debt per student")
barplot(as.matrix(so))
