i want to use nchoosek command in FOR loop in decreasing order for decoding process, it works in increasing order in FOR loop for encoding , Any suggestions

m=4;
r=4; 

%%%%%%%%%%%%%%%%%%%
for a=r:2
v=1:1:m;
   % Making combinations in decreasing order, but it is not working         
c = nchoosek(v, a); 
end

Answer 1

[Guillaume]

When you write a:b, matlab generates all numbers from a (included) to b (maybe included) in increments of +1. If b is smaller than one, no number is generated

If you want a different step than the default +1 you have to specify it explicitly. a:step|b, so:

for a = r:-1:2

See the documentation for more details

[Junaid Khan]

Thank you so much