MATLAB: Converting numbers to matrix(matrix formation)

matrix formation

If I am having some numbers, e.g

x=[ 12 12 12 2 2 2 2 3 3 ];

and now I want to convert into a matrix of 3 * 3.

Which MATLAB function is suitable for this?

Use the 'reshape' function.

B = reshape(A,11,250,3) ;

Where A is your 11*3(250 matrix

The "a" values are simply being used as row numbers for indexing into b.

b(a(:),:)

= b([1;2;1;2],:)

which is equivalent to

[ b(1,:);
  b(2,:);
  b(1,:);
  b(2,:)]