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+import graph;
+import palette;
+
+size(10cm,10cm,IgnoreAspect);
+
+real f(real x, real y) {
+ return 0.9*pow10(2*sin(x/5+2*y^0.25)) + 0.1*(1+cos(10*log(y)));
+}
+
+scale(Linear,Log,Log);
+
+pen[] Palette=BWRainbow();
+
+bounds range=image(f,Automatic,(0,1),(100,100),nx=200,Palette);
+
+xaxis("$x$",BottomTop,LeftTicks,above=true);
+yaxis("$y$",LeftRight,RightTicks,above=true);
+
+palette("$f(x,y)$",range,(0,200),(100,250),Top,Palette,
+ PaletteTicks(ptick=linewidth(0.5*linewidth())));
+
+