sum of random matrix = to zero

Dear All,

I want to generate a=6 X 6 random matrix but the sum(sum(a)) = zero. Help in this regard will be highly appreciated........

Regards..........

[Roger Stafford]

If you did not have the condition that the sum of the 36 numbers be zero, what would you have the distribution of these numbers be? Also are they integers or just any real numbers? What is their allowable range?

[Offroad Jeep]

The numbers can be integers and real numbers too..........

Answer 1

[Roger Stafford]

As was pointed out in your previous query, "sum of all anges is zero", one solution is to use 'randfixedsum' in the file exchange at:

   http://www.mathworks.com/matlabcentral/fileexchange/9700-random-vectors-with-fixed-sum

It was designed just for this kind of problem.

[John D'Errico]

You don't need to write the code. Just use it to generate 36 numbers with a sum of zero. Once you have that, then use reshape to make it a 6x6 array.