matrix heatmap plot

lib/Plot.cpp

@@ -247,6 +247,14 @@ PlotHistogram::PlotHistogram(const Histogram &h)
     setCommand("'" + tmpFileName + "' u 1:2 w steps");
 }
 
+// PlotMatrixNoRange constructor ///////////////////////////////////////////////
+PlotMatrixNoRange::PlotMatrixNoRange(const DMat &m)
+{
+    string tmpFileName = dumpToTmpFile(m);
+    
+    setCommand("'" + tmpFileName + "' matrix w image");
+}
+
 /******************************************************************************
  *                             Plot modifiers                                 *
  ******************************************************************************/

lib/Plot.hpp

@@ -138,6 +138,20 @@ public:
     virtual ~PlotHistogram(void) = default;
 };
 
+class PlotMatrixNoRange: public PlotObject
+{
+public:
+    // constructor
+    PlotMatrixNoRange(const DMat &m);
+    // destructor
+    virtual ~PlotMatrixNoRange(void) = default;
+};
+
+#define PlotMatrix(m)\
+PlotRange(Axis::x, -.5, (m).cols() - .5) <<\
+PlotRange(Axis::y, -.5, (m).rows() - .5) <<\
+PlotMatrixNoRange(m)
+
 /******************************************************************************
  *                             Plot modifiers                                 *
  ******************************************************************************/