index to column vectors (crossvalind)

inputs is a 3x50 matrix

      C = num2cell(inputs,1);
      Indices = cellfun(@(C) crossvalind('Kfold',C, 10),C,'un',0);
  Indices =

Columns 1 through 9
    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]
Columns 10 through 18
    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]
Columns 19 through 27
    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]
Columns 28 through 36
    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]
Columns 37 through 45
    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]
Columns 46 through 50
    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]

what i wanted to get was just indices for each column vector... any ideas?