From 81f6b20d1c41d8906900c57ab71ec08a007ea02c Mon Sep 17 00:00:00 2001
From: Patrick Simianer <p@simianer.de>
Date: Tue, 4 Aug 2015 15:57:31 +0200
Subject: voted perceptron

---
 voted_test.rb | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100755 voted_test.rb

(limited to 'voted_test.rb')

diff --git a/voted_test.rb b/voted_test.rb
new file mode 100755
index 0000000..c131ec2
--- /dev/null
+++ b/voted_test.rb
@@ -0,0 +1,50 @@
+#!/usr/bin/env ruby
+
+require 'zipf'
+
+STDOUT.sync = true
+
+STDERR.write "reading test data...\n"
+test = []
+test_f = ReadFile.new ARGV[0]
+n = 0
+while i = test_f.gets
+  test << SparseVector.from_kv(i.strip, '=', ' ')
+  n += 1
+  STDERR.write "#{n}\n" if n%1000==0
+end
+STDERR.write " test set size = #{test.size}\n"
+
+errors = 0
+ws = []
+cs = []
+ReadFile.readlines_strip(ARGV[1]).each { |l|
+  c, s = l.split "\t"
+  cs << c.to_i
+  next if !s||s.strip==""
+  ws << SparseVector.from_kv(s, "=", " ")
+}
+
+def sign(x)
+  if x <= 0
+    return -1.0
+  else
+    return 1.0
+  end
+end
+
+test.each { |x|
+  m = 0
+  ws.each_with_index{ |w,j|
+    m += sign(w.dot(x))*cs[j]
+  }
+  if m <= 0.0
+    errors += 1
+    puts -1
+  else
+    puts 1
+  end
+}
+
+STDERR.write "accuracy = #{(test.size-errors)/test.size.to_f}\n"
+
-- 
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