[NEST Users] How to repeatedly stimulate random neurons in a population ?

Hi,

I am in trouble here: I would like to stimulate every delta_t a random subset of neurons in a population. Should I create, for a population of size N, N generators and independently connect them to the N neurons, each spike generator provided with a random spike time series. Or is there a clever way to do it ?

Thanks for any help!

Best, Adrien