colorbar(,,[2.97 5]/6); // ticks on [9, 0.2]
// colors in [orange, yellow] must match figure #10 ones
+// 3.4) after graypolarplot()
+clf reset
+graypolarplot
+colorbar
+// Values from 30 to 137. Direct colors = full color map = dark red to white.
+
// 4) Plot3d
// ======
function plotSample()