anchor.diff:  				height = 500 - margin.top - margin.bottom
   
   				x = d3.time.scale!.range   [0 width]
  -
   				y = d3.scale.linear!.range [height, 0]
   
   				x-axis = d3.svg.axis!
  
positive.code: 					.attr \class 'y axis'
  					.call y-axis
  					.append \text
  					.attr \transform 'rotate(-90)'
  					.attr \y 6
  					.attr \dy \.71em
  					.style \text-anchor \end
  					.text \Value
  
  				svg.append \path
  					.datum entries
  
negative.code: 
  					x.domain d3.extent entries, -> new Date it.timestamp
  					y.domain d3.extent entries, -> it.value
  
  					svg.select \.x.axis
  						.call x-axis
  					svg.select \.y.axis
  						.call y-axis
  
  					svg.select \.line
  						.attr \d line entries
  				, 100
  	body
  		h1 Group #{group} #{type} sensor
  