I want to generate all possible combinations of 3*3 matrix, where the sum of all elements of this matrix equal 10.

I want to generate all possible combinations of 3*3 matrix, where the sum of all elements of this matrix equal 10.

[Fangjun Jiang]

you have to provide with more constraints such as all integer numbers and what range? Otherwise, the possibility is infinite.

[Mahmoud Ahmed]

I need just the code that can implement that without any constraints

Answer 1

[Fangjun Jiang]

Then you probably mean "one way" to generate the matrix, not "all possible combinations". The one way below does not even consider any negative numbers

a=rand(3);
a=a*10/sum(a(:))
sum(a(:))