I can use the following command to plot two figures together.
a = DensityPlot[Sin[x y], {x, -1, 1}, {y, -1, 1}];
b = DensityPlot[Sin[3 x y^2], {x, -1, 1}, {y, -1, 1}];
GraphicsRow[{a, b}, Frame -> All]
However, this two figure has their own x-y axis.
What I want is a picture like this:
They share their x-y axis.
How to plot a figure like this?
