1、菱形矩阵的构造：
Table[If[Abs[x]+Abs[y]<2,1,0],{x,-2,2,0.2},{y,-2,2,0.2}]
2、Table[If[Abs[x]+Abs[y]<2,1,0],{x,-2,2,0.2},{y,-2,2,0.2}]
3、Table[If[Abs[x]+Abs[y]<2,1,0],{x,-2,2,0.02},{y,-2,2,0.02}]
4、Table[If[Abs[2*x]+Abs[y]<2,1,0],{x,-2,2,0.2},{y,-2,2,0.2}]
5、圆形矩阵的构造：
Table[If[x^2+y^2<2,1,0],{x,-2,2,0.5},{y,-2,2,0.5}]
6、Table[If[x^2+y^2<4,1,0],{x,-2,2,0.2},{y,-2,2,0.2}]
7、椭圆形矩阵：
Table[If[x^2+y^2<3,1,0],{x,-2,2,0.2},{y,-2,2,0.1}]
8、Table[If[2*x^2+y^2<4,1,0],{x,-2,2,0.2},{y,-2,2,0.2}]
9、Table[If[x^2/2+y^2/3<1,1,0],{x,-2,2,0.02},{y,-2,2,0.02}]
10、不认识
Table[If[Sin[x]*Cos[y]<1/2,1,0],{x,-3,6,0.2},{y,-5,10,0.2}]
11、Table[If[Sin[x]+Cos[y]<1/2,1,0],{x,-3,6,0.2},{y,-5,10,0.2}]
12、Table[If[Sin[x+y]<1/2,1,0],{x,-3,6,0.2},{y,-5,10,0.2}]
Table[If[Sin[x^2+y^2]<1/2,1,0],{x,-3,6,0.2},{y,-5,10,0.2}]
