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LOG function

The LOG function computes the logarithm of an expression.

Note:

Do not confuse the LOGfunction with the function of the same name whichcreates a log file..

Return Value

DECIMAL

Syntax

LOG([base,] expression)

Arguments

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 is equal to 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