Thank you Klaus Asmus, jeff for your replies.
I want this to take advante of the fast calculation of the fortran and the easy to review and plotting capabilities of excel.
I have a complete code in fortran, with up to 2.000 lines and when I make changes to the code it is difficult to trace the changes in results, that is why I formulated a whole spreadsheet with the code formulae as I can "debbug visually" easily the code, but the problem is the limitation in space and speed of calculation of excel.
For the case I am studyin I would need about 1.200.000 columns to analyze a 2D sloshing waves problem for 1.600 particles and over 500.000 iterations which is an utopy in Excel. So I had to analyze 16 particles with up to 2.000 columns and a simulation rate of 500 iterations/hour.
I think I am going to keep on fortran coding and debugging in simply fortran and I will change the code to export values every iteration to review on excel file.