From 2e16486848a761d5f341ede096944a8526b97fc3 Mon Sep 17 00:00:00 2001
From: Patrick Simianer <p@simianer.de>
Date: Thu, 13 Feb 2014 17:39:24 +0100
Subject: SparseVector: approx_eql?, misc
---
lib/nlp_ruby/SparseVector.rb | 15 ++++++++++++++-
lib/nlp_ruby/misc.rb | 8 ++++++++
2 files changed, 22 insertions(+), 1 deletion(-)
(limited to 'lib/nlp_ruby')
diff --git a/lib/nlp_ruby/SparseVector.rb b/lib/nlp_ruby/SparseVector.rb
index 6843b70..fc9d55c 100644
--- a/lib/nlp_ruby/SparseVector.rb
+++ b/lib/nlp_ruby/SparseVector.rb
@@ -1,8 +1,11 @@
class SparseVector < Hash
- def initialize
+ def initialize arg=nil
super
self.default = 0
+ if arg.is_a? Array
+ from_a arg
+ end
end
def from_a a
@@ -21,6 +24,16 @@ class SparseVector < Hash
self.values.inject(:+)
end
+ def approx_eql? other, p=10**-10
+ return false if !other
+ return false if other.size!=self.size
+ return false if other.keys.sort!=self.keys.sort
+ self.keys.each { |k|
+ return false if (self[k]-other[k]).abs>p
+ }
+ return true
+ end
+
def average
self.sum/self.size.to_f
end
diff --git a/lib/nlp_ruby/misc.rb b/lib/nlp_ruby/misc.rb
index 1fa3878..80d932c 100644
--- a/lib/nlp_ruby/misc.rb
+++ b/lib/nlp_ruby/misc.rb
@@ -11,6 +11,14 @@ class Array
}
return true
end
+
+ def sum
+ self.inject(:+)
+ end
+
+ def mean
+ self.sum.to_f/self.size
+ end
end
def spawn_with_timeout cmd, t=4, debug=false
--
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