Google Chart Bar

gistfile1.rb

<% chart = Gchart.bar(
    # see http://code.google.com/apis/chart/docs/gallery/bar_charts.html for Google Charts API bar chart info
    #
    :grouped => 'true',
    :bar_colors => "D6A061,331F08",
    :bar_width_and_spacing => 'a,5,30',    # bar width, spacing width, group spacing width
    :size => '700x400', 
    :title => "Expected vs Actual Velocity", 
    :bg => 'FFFFFF00',   # transparent
    :legend => ['Expected', 'Actual'], 
    :data => [@report.collect_iteration(:expected), @report.collect_iteration(:actual)], 
    :axis_with_labels => "x,y",
    :axis_labels => [@report.collect_dates],
    :axis_range => [nil, [0, @report.max_value, 5]]) %>
<%= image_tag(chart) %>