MarkLogic 12 EA 1 Product Documentation
vec.dimension

vec.dimension(
   vector1 as vec.vector
) as Number

Returns the dimension of the vector passed in.

Parameters
vector1	The vector to find the dimension of.

  vec.dimension(vec.vector([3.14, 1.59, 2.65]))

  => 3

MarkLogic 12 EA 1 Product Documentationvec.dimension