Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/charlie/etc/minireport.rb,
lib/charlie/etc/monkey.rb

Overview

This was handled by ruport earlier, but that turned out to be overkill and give a huge amount of dependencies.

Direct Known Subclasses

Table

Instance Method Summary collapse

Instance Method Details

#at_rand ⇒ Object 



50
51
52
 
# File 'lib/charlie/etc/monkey.rb', line 50

def at_rand
  self[rand(size)]
end

#average ⇒ Object 



59
60
61
 
# File 'lib/charlie/etc/monkey.rb', line 59

def average
  sum.to_f / size
end

#dot_product(v) ⇒ Object 



40
41
42
43
44
 
# File 'lib/charlie/etc/monkey.rb', line 40

def dot_product(v)
  r=0.0
  each_with_index{|e,i| r+=e*v[i] }
  r
end

#map_with_index ⇒ Object

TODO 1.9



68
69
70
71
72
 
# File 'lib/charlie/etc/monkey.rb', line 68

def map_with_index # TODO 1.9
 r=[]
 each_with_index{|e,i| r << yield(e,i) }
 r
end

#rand_index ⇒ Object 



46
47
48
 
# File 'lib/charlie/etc/monkey.rb', line 46

def rand_index
  rand(size)
end

#shuffle ⇒ Object 



36
37
38
 
# File 'lib/charlie/etc/monkey.rb', line 36

def shuffle
  sort_by{ rand }
end

#stats ⇒ Object

TODO 1.9, use minmax



54
55
56
57
 
# File 'lib/charlie/etc/monkey.rb', line 54

def stats # TODO 1.9, use minmax
  return transpose.map(&:stats).transpose if at(0).is_a?(Array) # return stats of each component if elements are arrays
  [min,max,average,stddev]
end

#stddev ⇒ Object 



63
64
65
66
 
# File 'lib/charlie/etc/monkey.rb', line 63

def stddev
  mu = average
  Math.sqrt( map{|x| (x-mu)*(x-mu) }.sum / size )
end

#to_table(colnames = nil) ⇒ Object 



5
6
7
 
# File 'lib/charlie/etc/minireport.rb', line 5

def to_table(colnames=nil)
  Table.new(self,colnames)
end