class Spark::Mllib::DenseVector
A dense vector represented by a value array.
Dense vector is a vector in which most of the elements are non-zero.
Example:¶ ↑
DenseVector.new([1,2,3,4,5]).values # => [1, 2, 3, 4, 5] DenseVector.new(1..5).values # => [1, 2, 3, 4, 5]
Public Class Methods
from_java(object)
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# File lib/spark/mllib/vector.rb, line 94 def self.from_java(object) DenseVector.new(object.values) end
new(values)
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Calls superclass method
Spark::Mllib::VectorAdapter::new
# File lib/spark/mllib/vector.rb, line 59 def initialize(values) super(:dense, values.to_a) end
parse(data)
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Covert string to vector
DenseVector.parse("[1.0,2.0,3.0,4.0,5.0]")
# File lib/spark/mllib/vector.rb, line 67 def self.parse(data) unless data =~ /\[[0-9., ]+\]/ raise ArgumentError, 'Unknow format for DenseVector.' end data.sub!('[', '') data.sub!(']', '') data = data.split(',') data.map!(&:to_f) DenseVector.new(data) end
Public Instance Methods
marshal_dump()
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# File lib/spark/mllib/vector.rb, line 98 def marshal_dump values end
marshal_load(array)
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# File lib/spark/mllib/vector.rb, line 102 def marshal_load(array) initialize(array) end
to_java()
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# File lib/spark/mllib/vector.rb, line 90 def to_java JDenseVector.new(values) end
to_s()
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Convert vector to string
DenseVector.new([1,2,3,4,5]).to_s # => "[1.0,2.0,3.0,4.0,5.0]"
# File lib/spark/mllib/vector.rb, line 86 def to_s "[#{values.join(',')}]" end