mirror of https://github.com/apache/lucene.git
SOLR-11943: Update RefGuide for latlonVectors and haversineMeters functions.
This commit is contained in:
parent
f406ff91a8
commit
304836e675
|
@ -179,10 +179,11 @@ numeric arrays or a *distance matrix* for the columns of a matrix.
|
||||||
There are four distance measure functions that return a function
|
There are four distance measure functions that return a function
|
||||||
that performs the actual distance calculation:
|
that performs the actual distance calculation:
|
||||||
|
|
||||||
* euclidean() (default)
|
* euclidean (default)
|
||||||
* manhattan()
|
* manhattan
|
||||||
* canberra()
|
* canberra
|
||||||
* earthMovers()
|
* earthMovers
|
||||||
|
* haversineMeters (Geospatial distance measure)
|
||||||
|
|
||||||
The distance measure functions can be used with all machine learning functions
|
The distance measure functions can be used with all machine learning functions
|
||||||
that support different distance measures.
|
that support different distance measures.
|
||||||
|
|
|
@ -38,7 +38,7 @@ record in your Solr Cloud cluster computable.
|
||||||
|
|
||||||
*<<matrix-math.adoc#matrix-math,Matrix Math>>*: Matrix creation, manipulation, and matrix math.
|
*<<matrix-math.adoc#matrix-math,Matrix Math>>*: Matrix creation, manipulation, and matrix math.
|
||||||
|
|
||||||
*<<vectorization.adoc#vectorization,Streams and Vectorization>>*: Retrieving streams and vectorizing numeric fields.
|
*<<vectorization.adoc#vectorization,Streams and Vectorization>>*: Retrieving streams and vectorizing numeric and lat/long point fields.
|
||||||
|
|
||||||
*<<term-vectors.adoc#term-vectors,Text Analysis and Term Vectors>>*: Using math expressions for text analysis and TF-IDF term vectors.
|
*<<term-vectors.adoc#term-vectors,Text Analysis and Term Vectors>>*: Using math expressions for text analysis and TF-IDF term vectors.
|
||||||
|
|
||||||
|
|
|
@ -240,4 +240,66 @@ When this expression is sent to the /stream handler it responds with:
|
||||||
]
|
]
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
----
|
----
|
||||||
|
|
||||||
|
== Latitude / Longitude Vectors
|
||||||
|
|
||||||
|
The `latlonVectors` function wraps a list of tuples and parses a lat/long location field into
|
||||||
|
a matrix of lat/long vectors. Each row in the matrix is a vector that contains the lat/long
|
||||||
|
pair for the corresponding tuple in the list. The column labels for the matrix are
|
||||||
|
automatically set to the *id* field in the tuples. The the lat/lon matrix can then be operated
|
||||||
|
on by machine learning functions using the `haversineMeters` distance measure.
|
||||||
|
|
||||||
|
The `latlonVectors` function takes two parameters: a list of tuples and a named parameter called
|
||||||
|
*field*. The field parameter tells the `latlonVectors` function which field to parse the lat/lon
|
||||||
|
vectors from.
|
||||||
|
|
||||||
|
Below is an example of the `latlonVectors`.
|
||||||
|
|
||||||
|
[source,text]
|
||||||
|
----
|
||||||
|
let(a=random(collection1, q="*:*", fl="id, loc_p", rows="5"),
|
||||||
|
b=latlonVectors(a, field="loc_p"))
|
||||||
|
----
|
||||||
|
|
||||||
|
When this expression is sent to the /stream handler it responds with:
|
||||||
|
|
||||||
|
[source,json]
|
||||||
|
----
|
||||||
|
{
|
||||||
|
"result-set": {
|
||||||
|
"docs": [
|
||||||
|
{
|
||||||
|
"b": [
|
||||||
|
[
|
||||||
|
42.87183530723629,
|
||||||
|
76.74102353397778
|
||||||
|
],
|
||||||
|
[
|
||||||
|
42.91372904094898,
|
||||||
|
76.72874889228416
|
||||||
|
],
|
||||||
|
[
|
||||||
|
42.911528804897564,
|
||||||
|
76.70537292977619
|
||||||
|
],
|
||||||
|
[
|
||||||
|
42.91143870500213,
|
||||||
|
76.74749913047408
|
||||||
|
],
|
||||||
|
[
|
||||||
|
42.904666267479705,
|
||||||
|
76.73933236046092
|
||||||
|
]
|
||||||
|
]
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"EOF": true,
|
||||||
|
"RESPONSE_TIME": 21
|
||||||
|
}
|
||||||
|
]
|
||||||
|
}
|
||||||
|
}
|
||||||
|
----
|
||||||
|
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue