ln (Function)
This function returns the natural logarithm (base e) of p1.
Syntax
<DOUBLE> math:ln(<INT|LONG|FLOAT|DOUBLE> p1)
Query Parameters
| Name | Description | Default Value | Possible Data Types | Optional | Dynamic |
|---|---|---|---|---|---|
| p1 | The value of the parameter whose natural logarithm (base e) should be found. | INT LONG FLOAT DOUBLE | No | Yes |
Example 1
CREATE STREAM InValueStream (inValue double);
insert into OutMediationStream
select math:ln(inValue) as lnValue
from InValueStream;
If the inValue in the input stream is given, the function calculates its natural logarithm (base e) and directs the results to the output stream, OutMediationStream. For example, ln(11.453) returns 2.438251704415579.