I uploaded my excel file and matlab code.
I want to portray the value of the elevation (El1). But to do this, what I need to do is, The value of Elevation in cell D5 should be the same value of elevation in cell L2. Then the value of the suceeding elevation should be calculated as, the value of the previous elevation minus the value of the difference of Db1 and Da1.
To further explain, the value of the elevation is 6m. Therefore, the elevation in cell D5 should be 6m as well. But the value of the elevation in cell D6 should be like this:
cell D6 = (cell D5 - 1) - (Db1 - Da1). And it should continue on until the last cell of elevation is computed. But of course, it should portray the negative value. So in cell D13, the elevation should be a negative number. I don't know how to portray the value.