LOG: Calculating the Natural Logarithm

How to: |

Available Languages: reporting, Maintain

The LOG function returns the natural logarithm of a number.

Syntax: How to Calculate the Natural Logarithm

`LOG(in_value)`

where:

- in_value
Numeric

Is the value for which the natural logarithm is calculated, the name of a field that contains the value, or an expression that returns the value. If you supply an expression, use parentheses as needed to ensure the correct order of evaluation. If in_value is less than or equal to 0, LOG returns 0.

Example: Calculating the Natural Logarithm

LOG calculates the logarithm of the CURR_SAL field:

```
TABLE FILE EMPLOYEE
PRINT CURR_SAL AND COMPUTE
LOG_CURR_SAL/D12.2 = LOG(CURR_SAL);BY LAST_NAME BY FIRST_NAME
WHERE DEPARTMENT EQ 'PRODUCTION';
END
```

The output is:

LAST_NAME FIRST_NAME CURR_SAL LOG_CURR_SAL --------- ---------- -------- ------------ BANNING JOHN $29,700.00 10.30 IRVING JOAN $26,862.00 10.20 MCKNIGHT ROGER $16,100.00 9.69 ROMANS ANTHONY $21,120.00 9.96 SMITH RICHARD $9,500.00 9.16 STEVENS ALFRED $11,000.00 9.31

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