bar_chart.rb

require "pi_charts"

# create a new line chart
chart = PiCharts::Bar.new

# add labels ( x values )
chart.add_labels(["January", "February", "March", "April", "May"])

# add datasets
chart.add_dataset(label: "cats", data: [ 2, 0, 4, 7, 3 ])
chart.add_dataset(label: "dogs", data: [ 4, 6, 3, 9, 2 ])

# stack'em up
chart.stack

# neat 'lil configurations
chart.hover
chart.responsive

# generate html / js for chart
puts chart.html