MATLAB Answers

Combination of 4 Element

2 views (last 30 days)
How do i put this to the simple way?
bl is a cell contained one or two elements
a1 = cell2mat(bl(1));
a2 = cell2mat(bl(2));
a3 = cell2mat([bl(1) bl(2)]);
a4 = cell2mat(bl(3));
a5 = cell2mat([bl(1) bl(3)]);
a6 = cell2mat([bl(2) bl(3)]);
a7 = cell2mat([bl(1) bl(2) bl(3)]);
a8 = cell2mat(bl(4));
a9 = cell2mat([bl(1) bl(4)]);
a10 = cell2mat([bl(2) bl(4)]);
a11 = cell2mat([bl(1) bl(2) bl(4)]);
a12 = cell2mat([bl(3) bl(4)]);
a13 = cell2mat([bl(1) bl(3) bl(4)]);
a14 = cell2mat([bl(2) bl(3) bl(4)]);
a15 = cell2mat([bl(1) bl(2) bl(3) bl(4)]);
i tried using
for i=1:4
a{i}=combnk(bl,i);
end
but end up with cell in cell element, and it is hard to access.
thank you.

  0 Comments

Sign in to comment.

Accepted Answer

Jos (10584)
Jos (10584) on 21 Oct 2019
I make use of my function NCHOOSE, available here:
% bl is a cell array with four elements, each cell has 1 or 2 elements.
bl = {1 , [2 3], 4, [5 6]}
bi = nchoose(1:numel(bl))
a = cellfun(@(k) [bl{k}], bi, 'un', 0 )

  1 Comment

Machmud Roby Alhamidi
Machmud Roby Alhamidi on 22 Oct 2019
wow, this is works
thank you

Sign in to comment.

More Answers (1)

Andrei Bobrov
Andrei Bobrov on 21 Oct 2019
Edited: Andrei Bobrov on 22 Oct 2019
bl = cellfun(@(x)x(:)',bl,'un',0);
n = numel(bl);
ii = cell(n,1);
for i = 1:n
ii{i} = num2cell(nchoosek(1:4,i),2);
end
a = cellfun(@(x)[bl{x}],cat(1,ii{:}),'un',0);

  5 Comments

Show 2 older comments
Machmud Roby Alhamidi
Machmud Roby Alhamidi on 21 Oct 2019
i found this error if i change iii to ii
"Function 'subsindex' is not defined for values of class 'cell'."

Sign in to comment.


Translated by