Module: Eigen::MatrixConstructor

Included in:
MatrixComplex, MatrixDouble, MatrixFloat
Defined in:
lib/eigen.rb

Instance Method Summary collapse

Instance Method Details

#[](*rows) ⇒ Object 



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# File 'lib/eigen.rb', line 5

def [](*rows)
  ret = new(rows.size, rows[0].size)
  rows.each_with_index{|rw, i|
    ret.__set_row__(i, rw)
  }
  return ret
end

#block_diagonal(*ms) ⇒ Object 



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# File 'lib/eigen.rb', line 39

def block_diagonal(*ms)
  row_size = ms.inject(0){|sum, m|
   if m.respond_to?(:rows)
     raise(Eigen::EigenRuntimeError, "rows and cols are not equal") unless m.rows == m.cols
     sum + m.rows
   elsif m.is_a?(Numeric)
     sum + 1
   elsif m.is_a?(Array)
     sum + m.size
   else
     raise Eigen::EigenRuntimeError
   end
  }
  col_size = row_size
  ret = new(row_size, row_size)
  ret.setZero
  row_ind = 0
  ms.each{|m|
    if m.respond_to?(:rows)
      ret[row_ind, row_ind] = m
      row_ind += m.rows
    elsif m.is_a?(Array)
      m0 = self[*m]
      raise(Eigen::EigenRuntimeError, "rows and cols are not equal") unless m0.rows == m0.cols
      ret[row_ind, row_ind] = m0
      row_ind += m.size
    else
      ret[row_ind, row_ind] = m
      row_ind += 1
    end
  }
  return ret
end

#hstack(*ms) ⇒ Object 



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# File 'lib/eigen.rb', line 13

def hstack(*ms)
  col_size = ms.inject(0){|sum, m| m.cols + sum }
  row_size = ms[0].rows
  ret = new(row_size, col_size)
  col_ind = 0
  ms.each{|m|
    raise Eigen::EigenRuntimeError, "row sizes are different" unless row_size == m.rows
    ret[0,col_ind] = m
    col_ind += m.cols
  }
  return ret
end

#vstack(*ms) ⇒ Object 



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# File 'lib/eigen.rb', line 26

def vstack(*ms)
  row_size = ms.inject(0){|sum, m| m.rows + sum }
  col_size = ms[0].cols
  ret = new(row_size, col_size)
  row_ind = 0
  ms.each{|m|
    raise Eigen::EigenRuntimeError, "col sizes are different" unless col_size == m.cols
    ret[row_ind,0] = m
    row_ind += m.rows
  }
  return ret
end