STK_SAMPLING_RANDUNIF generates uniformly distributed points

 CALL: X = stk_sampling_randunif (N, DIM)

   generates N points, independent and uniformly distributed in the
   DIM-dimensional hypercube [0; 1]^DIM.

 CALL: X = stk_sampling_randunif (N, DIM, BOX)

   does the same thing in the DIM-dimensional hyperrectangle specified by the
   argument BOX, which is a 2 x DIM matrix where BOX(1, j) and BOX(2, j) are
   the lower- and upper-bound of the interval on the j^th coordinate.