MATLAB: Convert cell array to matrix with two columns and sort rows by first column value

Question

Hello,

I have a large Cell array with multiple cells. Every these cells has n-rows and two columns.

I want to convert this cell-array to one large matrix with j x 2 double matrix (j is sum value of all rows of all cells)

Cell_x =
  1×8 cell array
  Columns 1 through 4
    {13×2 double}    {10×2 double}    {9×2 double}    {11×2 double}
  Columns 5 through 8
    {9×2 double}    {12×2 double}    {6×2 double}    {7×2 double}
Matrix_x =
77 x 2 double

after it, I want to sort the rows by values of the first column:

Test_unsorted =
4 45
8 78
9 77
1 68
Test_sorted =
1 68
4 45
8 78
9 77

Thank you for your help!

Answer 1

More robust and more efficient than using cell2mat:

M = vertcat(Cell_x{:});
M = sortrows(M,1)