(defn heat-map*
  ([function x-min x-max y-min y-max & options]
     (let [opts (when options (apply assoc {} options))
	   color? (if (false? (:color? opts)) false true)
	   title (or (:title opts) "")
	   x-label (or (:x-label opts) "")
	   y-label (or (:y-label opts) "")
	   z-label (or (:z-label opts) "z scale")
	   theme (or (:theme opts) :default)
	   xyz-dataset (org.jfree.data.xy.DefaultXYZDataset.)
	   data (into-array (map double-array 
				 (grid-apply function x-min x-max y-min y-max)))
	   min-z (reduce min (last data))
	   max-z (reduce max (last data))
	   x-axis (doto (org.jfree.chart.axis.NumberAxis. x-label)
		    (.setStandardTickUnits (org.jfree.chart.axis.NumberAxis/createIntegerTickUnits))
		    (.setLowerMargin 0.0)
		    (.setUpperMargin 0.0)
		    (.setAxisLinePaint java.awt.Color/white)
		    (.setTickMarkPaint java.awt.Color/white))
	   y-axis (doto (org.jfree.chart.axis.NumberAxis. y-label)
		    (.setStandardTickUnits (org.jfree.chart.axis.NumberAxis/createIntegerTickUnits))
		    (.setLowerMargin 0.0)
		    (.setUpperMargin 0.0)
		    (.setAxisLinePaint java.awt.Color/white)
		    (.setTickMarkPaint java.awt.Color/white))
	   colors (or (:colors opts) 
		      [[0 0 127] [0 0 212] [0 42 255] [0 127 255] [0 127 255] 
		       [0 226 255] [42 255 212] [56 255 198] [255 212 0] [255 198 0]
		       [255 169 0] [255 112 0] [255 56 0] [255 14 0] [255 42 0]
		       [226 0 0]])
	   scale (if color?
		   (org.jfree.chart.renderer.LookupPaintScale. min-z max-z java.awt.Color/white)
		   (org.jfree.chart.renderer.GrayPaintScale. min-z max-z))
	   add-color (fn [idx color]
		       (.add scale 
			     (+ min-z (* (/ idx (count colors)) (- max-z min-z))) 
			     (apply #(java.awt.Color. %1 %2 %3) color)))
	   scale-axis (org.jfree.chart.axis.NumberAxis. z-label)
	   legend (org.jfree.chart.title.PaintScaleLegend. scale scale-axis)
	   renderer (org.jfree.chart.renderer.xy.XYBlockRenderer.)
	   
	   plot (org.jfree.chart.plot.XYPlot. xyz-dataset x-axis y-axis renderer)
	   chart (org.jfree.chart.JFreeChart. plot)]
       (do
	(.setPaintScale renderer scale)
	(when color? (doseq [i (range (count colors))]
		       (add-color i (nth colors i))))
	(.addSeries xyz-dataset "Series 1" data)
	(.setBackgroundPaint plot java.awt.Color/lightGray)
	(.setDomainGridlinesVisible plot false)
	(.setRangeGridlinePaint plot java.awt.Color/white)
	(.setAxisOffset plot (org.jfree.ui.RectangleInsets. 5 5 5 5))
	(.setOutlinePaint plot java.awt.Color/blue)
	(.removeLegend chart)
	(.setSubdivisionCount legend 20)
	(.setAxisLocation legend org.jfree.chart.axis.AxisLocation/BOTTOM_OR_LEFT)
	(.setAxisOffset legend 5.0)
	(.setMargin legend (org.jfree.ui.RectangleInsets. 5 5 5 5))
	(.setFrame legend (org.jfree.chart.block.BlockBorder. java.awt.Color/red))
	(.setPadding legend (org.jfree.ui.RectangleInsets. 10 10 10 10))
	(.setStripWidth legend 10)
	(.setPosition legend org.jfree.ui.RectangleEdge/RIGHT)
	(.setTitle chart title)
	(.addSubtitle chart legend)
	(org.jfree.chart.ChartUtilities/applyCurrentTheme chart)
	(set-theme chart theme))
       chart)))