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XQuery vec:subtract

MarkLogic 12 EA 1 Product Documentation
vec.subtract

vec.subtract(
   vector1 as vec.vector,
   vector2 as vec.vector
) as vec.vector

Summary

Returns the difference of two vectors. The vectors must be of the same dimension.

Parameters
vector1 The minuend vector.
vector2 The subtrahend vector.

Example

  const vec1 = vec.vector([3.14,1.59,2.65])
  const vec2 = vec.vector([3.58,9.79,3.23])

  vec.subtract(vec1,vec2)

  => "[ -0.44, -8.2, -0.58 ]"

Example

  const vec1 = vec.vector(xdmp.toJSON(fn.doc('pronethalol.json')).xpath('/data/array-node{embedding}'))
  const vec2 = vec.vector(fn.head(fn.doc('cell_renewal.json')).xpath('/data/array-node{embedding}'))

  vec.subtract(vec1,vec2)

  => The difference between vectors in JSON arrays named 'embedding'
    in documents 'pronethalol.json' and 'cell_renewal.json'

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