MATLAB Answers

Trying to write a script to calculate a sum

5 views (last 30 days)
Can somebody show me how to write a script to calculate the following function of N? It just confuses me a bit because if N is an even number then it may very well be the the lower and upper index are not integers... I don't know what the best way to deal with this hurdle is, perhaps make the function go from a negative integer to a positive integer then make a necessary substitution??
I'm not sure.. But i'd love to see what you guys come up with. I'm slowly learning how to write basic programs, but this one is a bit out of my league, and I'd appreciate if somebody could show me how
p.s. how do I make the LaTeX formatting turn on??

  4 Comments

Show 1 older comment
Michael Vaughan
Michael Vaughan on 26 Sep 2020
it's different though, because now my summation might be going from a non integer value to a non integer value, how do I get around that obstacle?
David Hill
David Hill on 26 Sep 2020
Works fine for N (odd). Where did you get the equation? Are you sure there is not another equation for N (even). The above equation does not work for N (even).
Michael Vaughan
Michael Vaughan on 26 Sep 2020
The equation is from a reputable source, a paper of https://en.wikipedia.org/wiki/Efstratia_Kalfagianni
It is implied that you take the sum as j increases by 1 at each iteration of the summation. Since the top and bottom index are opposites of eachother, this is well defined

Sign in to comment.

Accepted Answer

Alan Stevens
Alan Stevens on 26 Sep 2020
Simply let k = 2j and then you can write:
This will hold for both N even and N odd.

  0 Comments

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!