Matlab - Ayuda en la importacion de imagen de bd a una axes!!!

>> C

C =

    [         1]    [1x3 double]

    [2x1 double]    [2x3 double]

>> whos C

  Name      Size            Bytes  Class    Attributes

  C         2x2               544  cell

>> U=cell2mat(C)

U =

     1     2     3     4

     5     6     7     8

     9    10    11    12

>> whos U

  Name      Size            Bytes  Class     Attributes

  U         3x4                96  double

>> imshow(U)