LOG function

The LOG function computes the logarithm of an expression.

Note:

Do not confuse the LOG function with the function of the same name which creates a log file.

Return Value

DECIMAL

Syntax

LOG([base,] expression)

Parameters

base: The base by which to compute the logarithm. When you do not specify a value, the function computes the natural logarithm of the expression by using e for the base where e equals 2.718281828459.
expression: A numeric expression which is greater than zero. When the value is equal to or less than zero, LOG returns an NA value.

Examples

Example 8-14 Calculating a Natural Logarithm

In this example the LOG function is used to calculate the natural logarithm of the expression 4,000 + 6,000. The statements

DECIMALS = 5
SHOW LOG(4000 + 6000)

produce the following result.

9.21034