Function 'subsindex' is not defined for values of class 'cell'.

Please guide me.

 a = [1,0,1;1,1,0;1,1,1];
 b = [0,1;1,0];
 allcomb = [];

When I run this below command

 cell2mat(allcomb(num2cell(a,2),num2cell(b,2)))

I have error "Function 'subsindex' is not defined for values of class 'cell'."

[Moe_2015]

What is the output you are trying to get?

[Asad Abbas]

I want this output

 ans =
     1     0     1     0     1
     1     0     1     1     0
     1     1     0     0     1
     1     1     0     1     0
     1     1     1     0     1
     1     1     1     1     0

[Geoff Hayes]

Asad - the error is coming from

 allcomb(num2cell(a,2),num2cell(b,2)

What is the intent behind the above line of code? Are you trying to create a cell array allcomb and then convert it to a matrix? Note that a has three rows whereas b has two. How do you expect to combine them? What final result are you trying to obtain?

[Geoff Hayes]

Asad - how do you expect to get the answer (that you have posted) given a and b? it looks like b is the repeated (column-wise) three times, but what happens with a? You probably should describe the steps or rules that you expect to be followed.

[Asad Abbas]

I am trying to combine matrix. I did it with "repmat" but its only feasible where both matrix dimensions are different as I have given example here. But If dimensions are same then it dont give me unique combinations such as.

 a= [1, 0; 0, 1]
 b= [1, 0; 0, 1]

It gives me final combinations by using "repmat" (Not unique combinations)

 ans= 
      1  0  1  0
      0  1  0  1
      1  0  1  0
      0  1  0  1

But I want solution (all unique):

 ans = 
   1  0  1  0
   0  1  1  0
   1  0  0  1
   0  1  0  1
All combinations are unique.

Answer 1

[Guillaume]

One possible way of generating your desired output:

a = [1,0,1;1,1,0;1,1,1];
b = [0,1;1,0];

[rowa, rowb] = ndgrid(1:size(a, 1), 1:size(b, 1));
allcomb = [a(rowa, :), b(rowb, :)]