I have got a problem in my research. For the following matrix,
a a a a a a b b b b
a a a a a a b b b b
a a a a a a b b b b
a a a a a a b b b b
a a a a a a a a a a
a a a a a a a a a a
b b b b a a a a a a
b b b b a a a a a a
b b b b a a a a a a
b b b b a a a a a a,
does anyone know how...