What is the easiest way of composing this polynomial expressions in Excel?

Question

This is trivial in programming languages, but when I need to do something quick & dirty and to see whether I got the coefficients right, I usually go for Excel.

So, what have I got,

c1(i)        c2(i)   c3(i)  
0,321323232  1       0   
0,32132122   0       2  
0,321214324  1       2  
...  
..  
.  

The polynomial expression is

KT = SUM( AEA0 * c1(i) + J * c2(i) + PD * c3(i) )

i=1,37

1. One approach would be to make columns with AEA0 , J , PD (btw, these are constants) and then multiply & sum them with the coefficient columns. I don't like this one because it adds a lot of extra stuff, and it messes up my copy pasting later (when I copy paste the coefficients to a text file).

2. Second approach would be to manually form an expression clicking all the cells one by one,

    KT = AEA0 cell * A1 + J * B1 + PD * C1 + AEA0 * A2 + J * B2 + PD * C2 + ... 

you get the point. Is there a way to improve this approach in some way so it takes a range of A1 to A37 ?

Is there some better approach to forming this kind of expressions?

Answer 1

Put the value for AEA0 in Z1 . Put the value for J in Z2 . put the value for PD in Z3.

Then you can use:

=SUM(A1:A37)*Z1+SUM(B1:B37)*Z2+SUM(C1:C37)*Z3