ruport-summary-table.rb

require 'rubygems'
require 'ruport'

t = Table(%w[date vert a b])
t << ["2010-01-01", "life",10,20]
t << ["2010-01-01", "life",10,20]
t << ["2010-01-02", "life",10,20]
t << ["2010-01-03", "life",10,20]
t << ["2010-01-04", "life",10,20]
t << ["2010-01-01", "health",10,20]
t << ["2010-01-02", "health",10,20]
t << ["2010-01-03", "health",10,20]
t << ["2010-01-04", "health",10,20]

t.add_column('date-vert') { |r| [r.date, r.vert].join('-') }
g = Grouping(t,:by => ['date-vert'])
s = g.summary('date-vert',
  :a => lambda { |r| r.sum('a') },
  :b => lambda { |r| r.sum('b') }
)

puts s