Create dummy variables from elements of a cell

I have a cell type variable X with 100 rows and 8 columns. Here is an example:

X={
c1  c2  c3  c4  c5  c6  c7  c8
18  1  53.33  15.08  67  16  20601  1999
26  0  53.96  14.20  11  254  40406  1998
29  0  60.54  2.38  13  100  20601  1997
44  0  51.25  16.06  115  254  20601  1999 }

From c4 (included)and onwards I am trying to create dummy variables for each single different value. For instance, in this example in c8 I would only create 3 dummy variables (1997, 1998, 1999). But in c5 I will have to create 4 different dummies (67, 11,13,115). So in this example what I would have would be something similar to this:

c1 c2 c3    15.08 14.20 2.38 16.06 67 11 13 115 16 254 100 20601 40406 1999 1998 1997
18 1 53.33  1     0     0    0     1  0  0  0   1  0   0   1     0     1    0    0
26 0 53.96  0     1     0    0     0  1  0  0   0  1   0   0     1     0    1    0
29 0 60.54  0     0     1    0     0  0  1  0   0  0   1   1     0     0    0    1
44 0 51.25  0     0     0    1     0  0  0  0   0  1   0   1     0     1    0    0

Can someone help me? Thank you.

Answer 1

[Azzi Abdelmalek]

X={'c1'   'c2'  'c3'  'c4'  'c5'  'c6'  'c7'  'c8'
  18  1  53.33  15.08  67  16  20601  1999
  26  0  53.96  14.20  11  254  40406  1998
  29  0  60.54  2.38  13  100  20601  1997
  44  0  51.25  16.06  115  254  20601  1999 }
a=unique(cell2mat(X(2:end,4:end)),'stable');
v(1,1:3)=X(1,1:3);
v(3+1:3+numel(a))=num2cell(a);
for k=2:size(X,1)
  idx{k-1}=ismember(cell2mat(v(1,4:end)),cell2mat(X(k,4:end) ));
end
out=[v;[X(2:end,1:3) num2cell(cell2mat(idx'))]]