log Function

The logarithm function returns the natural logarithm of x.

Syntax

log(<x>) as <field>

Examples

Compute the natural log of a literal value

* | log(2) as v

Apply log scaling to a parsed numeric field

Use log to compress large-range values for aggregation:

_sourceCategory=Apache/Access
| parse "bytes=*" as bytes
| num(bytes)
| log(bytes) as log_bytes
| avg(log_bytes) by _sourceHost