MarkLogic 12 EA 1 Product Documentationvec:base64-encode
vec:base64-encode( $vector1 as vec:vector ) as xs:string
Summary
Returns the base64 encoding of the vector. Useful for compressing a high-dimensional float vector represented as a string into fewer characters.
| Parameters | |
|---|---|
| vector1 | The vector to base64 encode. |
See Also
- For decoding the output of this function, see vec:base64-decode
Example
xquery version "1.0-ml"; let $vec1 := vec:vector((3.14,1.59,2.65)) return vec:base64-encode($vec1) => FYT6NiFJhGw=AwAAAA==AAAAAA==w/VIQB+Fyz+amSlA
Example
xquery version "1.0-ml";
let $vec1 := vec:vector(xdmp:to-json(fn:doc('pronethalol.json'))/data/array-node{embedding})
return fn:string-length(vec:base64-encode($vec1)) || " VS " || fn:string-length(fn:string($vec1))
=> 8220 VS 18229
(: This function compressed the string representation of the 1536 dimensional float vector
in 'pronethalol.json' at array node 'embedding'
from 18229 characters to 8220 characters.
:)