ln

Description

Returns natural logarithm of a numeric expression. The value should be greater than 0.

Return type

float64

Domain

This is a scalar function (calculates a single output value for a single input row.)

Categories

Usage

ln( value )

Argument

Type

Required

Multiple

value

numeric

Required

Only one

Examples

make_col ln_val:ln(@.temperature)

Returns the natural logarithm of column temperature