LN
About the function
Finds the ln value of the values in a time series or of a number.
Logarithms with base numbers that equal euler's number (e= 2,718281828…) is called natural logarithms. The logarithm to a number x, is the exponent c, which the base number must be raised with to get the number x.
ec = x -> ln xe = c
The input value must be a positive, real number lager than 0, if not, the function returns an empty value.
Syntax
- LN(t|d)
Description
| # | Type | Description |
|---|---|---|
| 1 | t | Time series |
| 1 | d | Number |
Example
Example 1: LN(t)
Temperature_hour_VV = @LN(@t('Temperature_hour_raw'))
Example 2: LN(d)
ResultTs = @LN(1)
Example 2 returns the number 0 for all rows.