Removing certain type of repeating cell

Not familiar with coding. I want to remove certain type of repeating cells. I am using this code to find all combinations that equal a given sum:

function C = Conc(N)
P= [1:5 1:5 1:5]
C = {};
for ii = 1:numel(P)
    nestfun(P(ii),P(ii+1:end))
end
function nestfun(t,V)
if sum(t)<5
    for jj = 1:numel(V)
        nestfun([t,V(jj)],V(jj+1:end))
    end
elseif sum(t)==5
    C{end+1} = t;
end
end
end

This will result in say [1 1 1 2] [1 2 1 1] [1 3 1] [1 3 1] [3 1 1]. How would i remove the repeating [1 3 3]? In this project [1 1 1 2] is different than [1 2 1 1], but [1 3 1] is the same as [1 3 1].

Thank you.

Answer 1

[Stephen23]

A direct, intuitive, and reasonably efficient approach is to simply check the existing cell array content:

out = Conc(5)

out = 1×14 cell array
    {[1 2 1 1]}    {[1 2 2]}    {[1 3 1]}    {[1 4]}    {[1 1 2 1]}    {[1 1 3]}    {[1 1 1 2]}    {[2 3]}    {[2 1 2]}    {[2 2 1]}    {[3 1 1]}    {[3 2]}    {[4 1]}    {[5]}

function C = Conc(N)
P = [1:5,1:5,1:5];
C = {};
for ii = 1:numel(P)
    nestfun(P(ii),P(ii+1:end))
end
    function nestfun(t,V)
        if sum(t)<5
            for jj = 1:numel(V)
                nestfun([t,V(jj)],V(jj+1:end))
            end
        elseif sum(t)==5
            for k = 1:numel(C)
                if isequal(C{k},t)
                    return
                end
            end
            C{end+1} = t;
        end
    end
end

[MatlabQs]

This was very helpful. Thank you!