我的元胞矩阵是：Ai = [4x4 double] [4x4 double] [4x1 double] [3x4 double] [3x4 double] [4x1 double] [1x4 double] [1x4 double] [ -16]cell2mat(Ai)提示矩阵维数不一致，该如何处理？