需要帮助在Matlab中调试此代码 [英] Need help debugging this code in Matlab

问题描述

我有以下代码

B=[1 2 3; 10 20 30 ; 100 200 300 ; 500 600 800];
A=[100; 500; 300 ; 425];
SA = sum(A);
V={}; % number of rows for cell V = num of combinations -- column = 1                
n = 1;
 arr =  zeros(1,length(B))
for k = 1:length(B)                    
    for idx = nchoosek(1:numel(B), k)'  
       rows = mod(idx, length(B))
       if ~isequal(rows, unique(rows)) %if rows not equal to unique(rows)
           continue  %combination possibility valid      
       end %Ignore the combination if there are two elements from the same row 
       B_subset = B(idx)
       if (SA + sum(B_subset) <= 3000) %if sum of A + (combination) < 3000
           rows( rows==0 )=4
           arr(rows) = B_subset(:)
           V(n,1) = {arr}
           n = n + 1
            arr =  zeros(1,length(B))
        end
    end
end

如果A和B的某些值之和小于3000，则该组合才有效.

The combinations are supposed to be valid if the sum of A and some values of B are less than 3000.

我的代码存在问题，B的最后一个值B(3,3)在代码中仅占一次.

Problem with my code is, the last value of B, B(3,3), is only accounted for once in the code.

如果运行代码，则会在第12行注意到包含[0;0;0;800]的V单元格之一.但是还有其他可能的组合，例如[1;0;0;800].在SA + (1 + 800) < 3000位置，但是代码没有显示这种可能性.

If you run the code, you will notice one cell of V containing [0;0;0;800] at row 12. But there are other combinations possible as well such as [1;0;0;800]. Where SA + (1 + 800) < 3000 , however the code does not print this possibility.

我不知道为什么，有人可以帮我调试一下，找出为什么跳过某些组合吗?特别是B(3,3)吗?

I cannot figure out why, can someone please help me debug this and find out why some combinations are skipped ? especially B(3,3) ?

推荐答案

我怀疑这行代码未完全符合您的预期:

I suspect that this line is not doing exactly what you intended:

if ~isequal(rows, unique(rows))

相反，请尝试以下操作:

Instead, try this:

if ~isequal(length(rows), length(unique(rows)))

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