# Removing certain type of repeating cell

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MatlabQs on 5 Jan 2022
Commented: MatlabQs on 6 Jan 2022
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.

Stephen23 on 6 Jan 2022
Edited: Stephen23 on 6 Jan 2022
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 on 6 Jan 2022
This was very helpful. Thank you!