Info

This question is closed. Reopen it to edit or answer.

how to obtain the number of cases of length. but those matrices sum must be 30 or something value(on constraints)

1 view (last 30 days)
Brian Kim
Brian Kim on 13 Sep 2017
Closed: MATLAB Answer Bot on 20 Aug 2021
first, -constraints-
elements must be between 4 and 12
for example,
A=[6 7 8 9], sumA=sum(A)=30;
What is number of cases of length that can be obtained so that the sum becomes 30?
For reference,
If the length of the matrix is 5, A is [5 5 6 7 7].
  3 Comments
Walter Roberson
Walter Roberson on 13 Sep 2017
Stephen, you should not close duplicate questions that have Answers unless the Answers also appear in the original location.

Answers (2)

KSSV
KSSV on 13 Sep 2017
x0 = 4 ; x1 = 12 ;
x = x0:x1 ;
iwant = cell([],1) ;
count = 0 ;
for i = 1:length(x)
A = nchoosek(x,i) ;
thesum = sum(A,2) ;
if any(thesum==30)
count = count+1 ;
iwant{count} = A(thesum==30,:) ;
end
end
You have the possible combinations whose sum is 30 in iwant.
  3 Comments

Walter Roberson
Walter Roberson on 13 Sep 2017

Community Treasure Hunt

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

Start Hunting!