Module: JBLAS::MatrixConvertMixin

Included in:
MatrixMixin
Defined in:
lib/jblas/mixin_convert.rb

Overview

Mixin for conversion options.

Collected in MatrixMixin.

Instance Method Summary collapse

Instance Method Details

#columns_to_a ⇒ Object 



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# File 'lib/jblas/mixin_convert.rb', line 78

def columns_to_a
  (0...columns).map do |j|
    column(j).to_a
  end
end

#inspect ⇒ Object

Return an a representation of this object.



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# File 'lib/jblas/mixin_convert.rb', line 68

def inspect
  s = "<#{self.class} of size #{rows} #{columns}: #{to_s}>"
end

#rows_to_a ⇒ Object 



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# File 'lib/jblas/mixin_convert.rb', line 72

def rows_to_a
  (0...rows).map do |i|
    row(i).to_a
  end
end

#to_a ⇒ Object

Return the matrix as an Enumerable (just returns self).



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# File 'lib/jblas/mixin_convert.rb', line 92

def to_a #:nodoc:
  data.to_a
end

#to_ary ⇒ Object

Convert the matrix to an array.

If the matrix



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# File 'lib/jblas/mixin_convert.rb', line 87

def to_ary
  to_a
end

#to_mat ⇒ Object

:nodoc:



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# File 'lib/jblas/mixin_convert.rb', line 96

def to_mat #:nodoc:
  self
end

#to_matrix ⇒ Object 



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# File 'lib/jblas/mixin_convert.rb', line 100

def to_matrix
  self
end

#to_s(fmt = nil, coljoin = ', ', rowjoin = '; ') ⇒ Object

Convert this matrix to a string.

This methods takes a few extra arguments to control how the result looks like.

fmt is a format as used by sprintf, coljoin is the string used to join column, rowjoin is what is used to join rows. For example,

x.to_s('%.1f', ' ', "\n")

Returns a matrix where columns are separated by spaces, rows by newlines and each element is shown with one digit after the comma.



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# File 'lib/jblas/mixin_convert.rb', line 52

def to_s(fmt=nil, coljoin=', ', rowjoin='; ')
  if fmt
    x = rows_to_a
    '[' + x.map do |r|
      if Enumerable === r
        r.map {|e| sprintf(fmt, e)}.join(coljoin)
      else
        sprintf(fmt, r)
      end
    end.join(rowjoin) + ']'
  else
    toString
  end
end