Text Metric directive
The TEXT-METRIC directive provides a metric (from 0 to 1) measuring the difference between two sequence of characters, using a specified method of measuring the distance between strings.
Syntax
text-metric 'method' :column1 :column2 :destination
method
 specifies the method to be used to measure the distance between the strings ofÂcolumn1
 andÂcolumn2
.destination
 is the column the resulting difference will be stored in. If it exists, it will be overwritten. If it does not exist, it will be created.
Note:Â If either or both of the two columns do not exist, no error will be returned, and the destination column will still be created or overwritten.
Usage Notes
The value of the metric is always between 0 and 1.
These distance measure methods are supported:
block-distance
block
cosine
damerau-levenshtein
dice
euclidean
generalized-jaccard
identity
jaccard
jaro
levenshtein
longest-common-subsequence
longest-common-substring
overlap-cofficient
simon-white
Example
Using this record as an example:
{
"tweet1": "CheeseBurgers are God tellin us everything's gonna be cool...",
"tweet2": "Beer is God's gift to humankind."
}
Applying this directive:
text-metric 'longest-common-subsequence' :tweet1 :tweet2 :distance
results in this record:
Â
Created in 2020 by Google Inc.