Add implementation of Rubella::Weighting::Expotential

lib/rubella/weighting/exponential.rb

@@ -1,8 +0,0 @@
-module Rubella
-  module Weighting
-
-    class Expotential
-    end
-
-  end
-end

lib/rubella/weighting/expotential.rb

@@ -0,0 +1,50 @@
+require "rubella/weighting/base"
+
+module Rubella
+  module Weighting
+
+    # The Rubella::Weighting::Expotential object weights every bucket per
+    # amount of cores. But the cores with higher load get a visualisation
+    # boost, which is expotential. So one high load core, will have much more
+    # color, than serveral less load cores.
+    #
+    class Expotential < Base
+
+      # Creates a output readable list.
+      # This list is Array within a subarrays, which contain the buckets for
+      # every time value unit.
+      #
+      # @param input Rubella::Input An input object
+      # @return Rubella::Storage
+      def parse input
+        data = input.data
+        # no data, no work
+        return [] if data.length == 0
+
+        # total amount of cores
+        total_amount = data[0].length
+
+        # prepare data
+        data_list = Array.new()
+        bucket_no = 0
+
+        data.each do |cores|
+          # every 10 load percent one heatpoint
+          i = 0
+          data_list << Array.new(buckets) do
+            amount    = cores.select { |core| core >= i and core < (i+@steps)}.length
+            i         = i + @steps
+            core      = (amount.to_f*bucket_no**0.8)/total_amount
+            bucket_no = bucket_no + 1
+
+            core
+          end
+        end
+
+        Rubella::Storage.new data_list
+      end
+
+    end
+
+  end
+end