Class: MDArray

Inherits:
Object
  • Object
show all
Defined in:
lib/JRubyR/as_mdarray.rb,
lib/JRubyR/index.rb

Overview

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.build(type, shape, storage = nil, layout = :row) ⇒ Object

Builds a new MDArray

Parameters:

  • type —

    the type of the new mdarray to build, could be boolean, byte, short, int, long, float, double, string, structure

  • shape (Array) —

    the shape of the mdarray as a ruby array

  • storage (Array) (defaults to: nil) —

    a ruby array with the initialization data



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# File 'lib/JRubyR/index.rb', line 53

def self.build(type, shape, storage = nil, layout = :row)

  if !@LAYOUT.include?(layout)
    raise "Unknown layout #{layout}"
  end

  if (shape.is_a? String)
    # building from csv
    # using shape as filename
    # using storage as flag for headers
    storage = (storage)? storage : false
    parameters = Csv.read_numeric(shape, storage)
    shape=[parameters[0], parameters[1]]
    storage = parameters[2]
  end

  if (storage)
    # nc_array = Java::UcarMa2.Array.factory(dtype, jshape, jstorage)
    nc_array = make_nc_array(type, shape, storage, layout)
  else
    nc_array = Java::UcarMa2.Array
      .factory(DataType.valueOf(type.upcase), shape.to_java(:int))
  end

  klass = Object.const_get("#{type.capitalize}MDArray")
  return klass.new(type, nc_array)

end

.index_factory(shape) ⇒ Object

Creates new index with the given shape and column-major layout



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# File 'lib/JRubyR/index.rb', line 86

def self.index_factory(shape)

  stride = comp_stride(shape)
  index = Java::UcarMa2.Index.factory(shape.to_java(:int))
  index.stride = stride.to_java(:int)
  index.precalc
  index

end

Instance Method Details

#pp ⇒ Object 



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# File 'lib/JRubyR/as_mdarray.rb', line 43

def pp
  print
end

#z ⇒ Object 



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# File 'lib/JRubyR/as_mdarray.rb', line 35

def z
  self[0]
end