$ln
Computes the natural logarithm (base e) of a numeric expression.
Syntax
{ "$ln": <numberExpression> }
Example
Input
{ "value": 54.6 }
Stage
{ "$project": { "naturalLog": { "$ln": "$value" } } }
Output
{ "naturalLog": 3.999093 }
Computes the natural logarithm (base e) of a numeric expression.
{ "$ln": <numberExpression> }
{ "value": 54.6 }
{ "$project": { "naturalLog": { "$ln": "$value" } } }
{ "naturalLog": 3.999093 }