VectorXi::Random() seems always return random integers from [-10,10]. Is this by design? and Why?

sth4nth wrote:VectorXi::Random() seems always return random integers from [-10,10]. Is this by design? and Why?

Forgot to mention that I'm using Eigen 3 beta1, the code is simply

cout<< VectorXi::Random(20);

It's true. The reason was that I wanted to get nice-looking examples in the documentation, which I admit is a pretty bad reason. I guess we should switch the default uniform distribution over the integer type's range, and keep a compile-time option for the old behavior for making the docs.

Filed bug:

http://eigen.tuxfamily.org/bz/show_bug.cgi?id=45

bjacob wrote:It's true. The reason was that I wanted to get nice-looking examples in the documentation, which I admit is a pretty bad reason. I guess we should switch the default uniform distribution over the integer type's range, and keep a compile-time option for the old behavior for making the docs.

That will be great. Thanks.
Btw, I think random number generators really should be optimized both on the efficiency and random cycle lengths, since they are crucial for some applications like statistics and Monte Carlo simulation.

Our random generator is not optimized at all, and we don't have a big interest in that, it's not our specialty; if this is performance critical to you, you should use your own.