Method: Statsample::Graph::Scatterplot#rubyvis_panel

Defined in:
lib/statsample/graph/scatterplot.rb

#rubyvis_panel ⇒ Object

Returns a Rubyvis panel with scatterplot

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# File 'lib/statsample/graph/scatterplot.rb', line 120

def rubyvis_panel # :nodoc:
  that=self
  #p @v1.map {|v| v}
  
  @minimum_x||=@v1.min
  @maximum_x||=@v1.max
  @minimum_y||=@v2.min
  @maximum_y||=@v2.max
  
  colors=Rubyvis::Colors.category10
  
  margin_hor=margin_left + margin_right
  margin_vert=margin_top  + margin_bottom
  
  x=Rubyvis::Scale.linear(@minimum_x, @maximum_x).range(0, width - margin_hor)
  y=Rubyvis::Scale.linear(@minimum_y, @maximum_y).range(0, height - margin_vert)
  @x_scale=x
  @y_scale=y
  vis=Rubyvis::Panel.new do |pan| 
    pan.width  width  - margin_hor
    pan.height height - margin_vert
    pan.bottom margin_bottom
    pan.left   margin_left
    pan.right  margin_right
    pan.top    margin_top
    # X axis
    pan.rule do
      data y.ticks
      bottom y
      stroke_style {|d| d!=0 ? "#eee" : "#000"}
      label(:anchor=>'left') do
        visible {|d| d!=0 and  d < that.width}
        text y.tick_format
      end
    end
    
    # Y axis
    pan.rule do
      data x.ticks
      left x
      stroke_style {|d| d!=0 ? "#eee" : "#000"}
      label(:anchor=>'bottom') do
        visible {|d| d>0 and d < that.height}
        text x.tick_format
      end
    end
    # Add lines on median
    add_line_median(pan) if line_median

    pan.panel do
      data(that.data)
      dot do
        left   {|d| x[d[:x]]}
        bottom {|d| y[d[:y]]}
        
        fill_style {|v| 
          alpha=(that.dot_alpha-0.3<=0) ? 0.1 : that.dot_alpha-0.3
          if that.groups
            
            colors.scale(that.groups[index]).alpha(alpha)
          else
            colors.scale(0).alpha(alpha)
          end
        }
        
        stroke_style {|v|
          if that.groups
            colors.scale(that.groups[parent.index]).alpha(that.dot_alpha)
          else
            colors.scale(0).alpha(that.dot_alpha)
          end
        }
        shape_radius 2
      end
    end
  end
  vis
end