How to calculate the delta

Hi,

I have below matrix:

1 3 Signal   6  1 Offset 3
3 5 Deffect  4  0 Offset 6
1 3 Signal   6  1 Offset 3
3 5 Signal   4  0 Offset 6

I want to calculate the delta of the rows ( I struck how to avoid if it is not a double value): My desired output as below:

2     2    Deffect   -2    -1  Offset    3
-2   -2    Signal     2     1  Offset   -3
2     2    Signal    -2    -1  Offset    3

But the text column index may vary in my future input(may not be in column 3 & 6, and the text may appear in many columns)

Many thanks in advance

Answer 1

[Azzi Abdelmalek]

M={1 3 'Signal'   6  1 'Offset' 3
3 5 'Deffect'  4  0 'Offset' 6
1 3 'Signal'   6  1 'Offset' 3
3 5 'Signal'   4  0 'Offset' 6}
idx=all(cellfun(@isnumeric,M))
A=M(2:end,:);
A(:,idx)=num2cell(diff(cell2mat(M(:,idx))))