Help understanding how to make a bar chart using ggplot2
- by celenius
I'm trying to use the bar_geom function of ggplot2, but I can't understand how to use it. I've made a small sample of my code to show what I am trying to do:
library(ggplot2)
# sample data
sampleData = data.frame(
v1=c('a','b','c','d','e', 'f','g', 'h', 'i','j'),
v2=c(1:10)
)
sampleData$Names = data.frame( Names = paste(sampleData$v1, sampleData$v2, sep="") )
sampleData$Values = c(1:10)
# make plot
x = sampleData$Values
y = sampleData$Names
qplot(
x, y, data = sampleData,
geom="bar"
)
I want sampleData$Names to be on the x-axis of my graph, labeling each bar and and sampleData$Values to scale the bar height. I want the y-axis to be specified as a range. I realize that I don't understand how ggplot2 functions as this small example does not work, yet my other example is generating a plot but I cannot specify a y-range as it considers the variables to be categorical.
