Function: vecmin
Section: operators
C-Name: vecmin
Prototype: G
Help: vecmin(x): minimum of the elements of the vector/matrix x
Doc: if $x$ is a vector or a matrix, returns the minimum
 of the elements of $x$, otherwise returns a copy of $x$. Error if $x$ is
 empty.
Description:
  (vecsmall):small vecsmall_min($1)
  (gen):gen        vecmin($1)
