Extract sub-matrices of matrix between NaN into cell array

Say I have a matrix of values

   A=
 [NaN,NaN;
  NaN,NaN;
  NaN,NaN;
  -12,14;
  -13,14;
  -14,13;
  -15,13;
  NaN,NaN;
  NaN,NaN;
  NaN,NaN;
  NaN,NaN;
  NaN,NaN;
  -15,13;
  -14,13;
  -13,14;
  -12,14;
  -12,13;
  -11,13;
  -10,14;
  -9,14;
  NaN,NaN;
  NaN,NaN;
  NaN,NaN;
  NaN,NaN]

How can I extract the segments of the matrix that are between NaN into a cell array where each cell is an extracted matrix?

EDIT Say instead I have matrix as such: B2= [NaN,NaN;NaN,NaN;NaN,NaN;-12,14;-13,14;-14,13;-15,13;NaN,NaN;NaN,NaN;... NaN,NaN;NaN,NaN;NaN,NaN;-15,13;-14,13;-13,14;-12,14;-12,13;-11,13;... -10,14;-9,14;NaN,NaN;NaN,NaN;NaN,NaN;NaN,NaN;-11,12;-13,13;NaN,NaN];

B2 =

   NaN   NaN
   NaN   NaN
   NaN   NaN
   -12    14
   -13    14
   -14    13
   -15    13
   NaN   NaN
   NaN   NaN
   NaN   NaN
   NaN   NaN
   NaN   NaN
   -15    13
   -14    13
   -13    14
   -12    14
   -12    13
   -11    13
   -10    14
    -9    14
   NaN   NaN
   NaN   NaN
   NaN   NaN
   NaN   NaN
   -11    12
   -13    13
   NaN   NaN
   NaN   NaN

How do I extract each non-NaN part into a separate cell of a cell array? The number of NaNs vary as does the length of the non-NaNs sections. NaNs will always be paired between columns. Pedro Villena presented a solution that works when the length of the non-NaN part gets sequential larger but this is not the case in the actual data or in the variable B2 above. I will be doing this multiple times on matrices much longer 78000-350000 rows x 4-6 columns.

[Doug Hull]

you need to be more specific. Are you doing this once, for this specific matrix? Will NaN always be paired like this. Will there always be non-NaN, will there always be two blocks, or N-blocks?

Answer 1

[Jan]

A = [NaN,NaN;NaN,NaN;NaN,NaN;-12,14;-13,14;-14,13;-15,13;NaN,NaN;NaN,NaN;...
      NaN,NaN;NaN,NaN;NaN,NaN;-15,13;-14,13;-13,14;-12,14;-12,13;-11,13;...
      -10,14;-9,14;NaN,NaN;NaN,NaN;NaN,NaN;NaN,NaN;-11,12;-13,13;NaN,NaN];
pos = [true, isnan(A(:, 1)).', true];
ini = strfind(pos, [true, false]);
fin = strfind(pos, [false, true]) - 1;
C   = cell(1, length(ini));
for iC = 1:length(ini)
  C{iC} = A(ini(iC):fin(iC), :);
end

Answer 2

[Andrei Bobrov]

i1 = all(~isnan(A),2);
i2 = i1(:)';
idx = [strfind([~i2(1),i2],[0 1]); strfind([i2, ~i2(end)],[1 0])];
B = mat2cell(A(i1,:),diff(idx)+1,size(A,2));