This much untested code makes me sad. But I fixed the bug whereby no rake tasks worked because of the require line.

Gemfile.lock

@@ -44,14 +44,6 @@ GIT
     carrierwave (0.5.0)
       activesupport (~> 3.0)
 
-GIT
-  remote: git://github.com/xiaods/lazy_high_charts.git
-  revision: c63f49ce10e1dad8a0b796233306742a1320e7b0
-  ref: c63f49ce10e1dad8a0b7
-  specs:
-    lazy_high_charts (1.0.8)
-      bundler (~> 1.0)
-
 PATH
   remote: vendor/gems/jasmine
   specs:
@@ -390,7 +382,6 @@ DEPENDENCIES
   jasmine!
   json (= 1.4.6)
   launchy
-  lazy_high_charts!
   mini_magick (= 3.2)
   mocha
   mongrel

lib/tasks/statistics.rake

@@ -1,24 +1,23 @@
 namespace :statistics do
 
-  require 'config/environment'
-
   desc 'on users: total, active'
-
   namespace :users do
-    users            = User.where(:getting_started => false).count
+    def set_up_user_stats
-    incomplete       = User.where("getting_started = TRUE AND sign_in_count >= 0").count
+      @users = User.where(:getting_started => false).count
-    invitations      = Invitation.count
+      @incomplete = User.where("getting_started = TRUE AND sign_in_count >= 0").count
-    contacts_active  = Contact.where(:pending => false).count
+      @invitations = Invitation.count
-    contacts_pending = Contact.count - contacts_active
+      @contacts_active = Contact.where(:pending => false).count
-    aspects          = Aspect.count
+      @contacts_pending = Contact.count - @contacts_active
-    last_24_hrs      = User.where("current_sign_in_at > '#{(Time.now - 1.day).to_date}'").count
+      @aspects = Aspect.count
-    last_7_d         = User.where("current_sign_in_at > '#{(Time.now - 7.days).to_date}'").count 
+      @last_24_hrs = User.where("current_sign_in_at > '#{(Time.now - 1.day).to_date}'").count
+      @last_7_d = User.where("current_sign_in_at > '#{(Time.now - 7.days).to_date}'").count
 
-    notification_off     = User.where(:disable_mail=>true).count
+      @notification_off = User.where(:disable_mail=>true).count
-    notification_off_per = notification_off.to_f / users
+      @notification_off_per = @notification_off.to_f / @users
-    no_invites           = User.where(:invites => 0).count
+      @no_invites = User.where(:invites => 0).count
 
-    @sql = ActiveRecord::Base.connection();
+      @sql = ActiveRecord::Base.connection
+    end
 
     def users_with_x_posts(count)
       @sql.execute(
@@ -39,12 +38,13 @@ namespace :statistics do
     end
 
     task :human => :environment do
-      puts "Users: %i and %i incomplete" % [users, incomplete]
+      set_up_user_stats
-      puts "Invitations sent: %i" % invitations
+      puts "Users: %i and %i incomplete" % [@users, @incomplete]
-      puts "Contacts: %i and %i pending" % [contacts_active, contacts_pending]
+      puts "Invitations sent: %i" % @invitations
-      puts "Aspects: %i" % aspects
+      puts "Contacts: %i and %i pending" % [@contacts_active, @contacts_pending]
-      puts "Users signed in in last 24h: %i" % last_24_hrs
+      puts "Aspects: %i" % @aspects
-      puts "Users signed in in last 7d: %i" % last_7_d
+      puts "Users signed in in last 24h: %i" % @last_24_hrs
+      puts "Users signed in in last 7d: %i" % @last_7_d
 
       puts "Users with more than one post: %i" % users_with_x_posts(1)
       puts "Users with more than five post: %i" % users_with_x_posts(5)
@@ -65,20 +65,21 @@ namespace :statistics do
     end
 
     task :splunk => :environment do
-      puts "event=statistic, type=users, count=#{users}, "+
+      set_up_user_stats
-      "incomplete=#{incomplete}, " +
+      puts "event=statistic, type=users, count=#{@users}, "+
-      "last_1d=#{last_24_hrs}, "+
+             "incomplete=#{@incomplete}, " +
-      "last_7d=#{last_7_d}, " +
+             "last_1d=#{@last_24_hrs}, "+
-      "notification_off=#{notification_off}, "+
+             "last_7d=#{@last_7_d}, " +
-      "notification_off_%=#{notification_off_per}, "+
+             "notification_off=#{@notification_off}, "+
-      "no_invites=#{no_invites}"
+             "notification_off_%=#{@notification_off_per}, "+
+             "no_invites=#{@no_invites}"
 
 
-      puts "event=statistic, type=invitations, count=#{invitations}"
+      puts "event=statistic, type=invitations, count=#{@invitations}"
-      puts "event=statistic, type=contacts, active_count=#{contacts_active}"
+      puts "event=statistic, type=contacts, active_count=#{@contacts_active}"
-      puts "event=statistic, type=contacts, pending_count=#{contacts_pending}"
+      puts "event=statistic, type=contacts, pending_count=#{@contacts_pending}"
 
-      puts "event=statistic, type=aspect, count=#{aspects}"
+      puts "event=statistic, type=aspect, count=#{@aspects}"
     end
   end