MATLAB: Subtraction on the cells elements

difference in cells

i have a cell array x of size 12*1
and the cells are column vectors of type double 
x{1,1}=[1  2  5  6  7  7  8 ];
x{2,1}=[ 1 2  6  6  7  8  8]
and so on
i want the output y as a cell array with 
y{1,1}=[1 1 3 1 1 0 1];
y{2,1}=[1 1 4 0 1 1 0];
the elements of the cell in the output should be the difference i-(i-1). let the first element be as it is it. start with i =2:length x{i,1}
for each each cell the operation shouldbe done and stored in a different cell

Best Answer

Note that [1 2 5 6 7 7 8 ] in your example is a row vector, not a column vector as you state. If the content of the cells are indeed column vectors then you'll have to change the , into ; where indicated
%demo data
x = num2cell(randi(10, 12, 10), 2)
%processing
y = cellfun(@(vec) [vec(1), diff(vec)], x, 'UniformOutput', false)  %replace [vec(1), by [vec(1); if working on column vectors
or if you want to use a loop instead of cellfun:
y = cell(size(x));  %preallocation
for idx = 1:numel(x)
    y{idx} = [x{idx}(1), diff(x{dix})];  %replace , by ; for column vectors
end
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