How generate a cumulative sum sequence funtions

Forum|Forum|29 days ago
August 17, 2026
9 replies
130 views

i Have PTC MATHCAD PRIME
need a function to generate a cumulative sum sequence where Ui=0 and Ui-1 =0, iteratively calculating Ui+1 up to a 4094 rows , 1column vector.

Mathcad Usage

Best answer by Werner_E

Here is how I interpreted the iteration in your question. But the results differ from the ones you posted so it may help if you show step by step how to arrive at -9.00704*10^-6 and 3.37999*10^-5 using the values for P, A, B and K shown in your screenshot.:

Werner_E

Answer

25-Diamond I

Here is how I interpreted the iteration in your question. But the results differ from the ones you posted so it may help if you show step by step how to arrive at -9.00704*10^-6 and 3.37999*10^-5 using the values for P, A, B and K shown in your screenshot.:

P

pannus0

Author

10-Marble

here ist’s
It starts with 0, assumed initial value

second rows:

third

and so on until completing 4094 rows, because "origin=0"

Werner_E

25-Diamond I

I don’t care about and will not look at just pictures(!) from an Excel sheet.

What I meant was that you show in Mathcad or Prime how to arrive at the first two non-zero values in vector u which you show in your first Excel screenshot by using just the numbers for P, A, B and K which you show in your first screenshot. I mean using the numbers with just the precision you had shown and which I also used in my screenshot.

Simply show the manual calculation in Mathcad/Prime, the first two iteration steps, which you have in mind and show that you arrive at the values you has shown.