why here comes an error as:
idx=logical(de2bi(todecimal(1:(2^l-1)),16));

when I wanna use command:
idx=logical(de2bi(todecimal(1:(2^l-1)),16));

my local matlab 2019b function well, but online project confuze me.

And I found that:
Others solution used dec2bin function, which has matlab document as the de2bi function, work out the same way, but maybe the compile problem here makes the different result of online systeerm to local solftware.

why this isn't working here?
it works on my laptop;
function ind = subset_sum(v,n)
k=dec2bin(0:2^length(v)-1);
b=k.*v;
l=find(sum(b')==n);
m=k(l,:).*(1:length(v));
ind=m(m>0);
end

nchoosek function is fantastic!

So apparently this is failing because my empty matrix is
1×0 (size 0) double
but Test Case 3 requires an empty matrix that is
0×0 (size 0) double
Hmmmm....

So apparently this is failing because my empty matrix is 1×0 (size 0) double but Test Case 3 requires an empty matrix that is 0×0 (size 0) double Hmmmm....
[Subsequently amended to pass the test suite as Solution 1163376.]

While I think I should have a rest and think more....

I really don't understand why, without the last three rows, it works for every test but the third.

compare the size(...) of the output with and without those lines and you will find out why :-)

What am I doing wrong? If I enter the code on my computer, I am getting the correct solutions for the first and last case. I even cleared all other variables from the workspace.

Apparently I was using intersect wrong.

great solution

Why? I think my solution is right, but it always gives me a 'Fail'??? Can anyone help?

Take a look at your error messages. They are telling you that the function "combntns" is undefined. So it appears that you have this function on your computer, but it is not part of MATLAB and so Cody doesn't know what it is.

artful solution.I can't think it out myself

Is this a bug in MATLAB? v(c) == v(c') !!!

I mean, v(c) == v(c') if c is a vector. This is not true for a matrix c.

why???

Despite the warning, I'm stoked it worked.

{Warning: Concatenation involves an empty array with an
incorrect number of rows.
This may not be allowed in a future release.}

well, I guess with Cody's way of scoring this would work, but honestly, a bit risky to use in "real life"

Buggy, mine is empty but with size, and doesn't get right answer.

only works for v > 0