Log (FPScript)
Calculates the logarithm to the base e (natural logarithm).
Syntax
Log(Number)
The syntax of the Log function consists of the following parts:
Part |
Description |
|---|---|
Number |
The number for which the logarithm is to be calculated. For aggregate data structures, the logarithm of the Y component is calculated. All data structures are allowed. All numeric data types are permitted, except calendar time und time span. |
Remarks
The result has the same structure as the argument Number. The calculation is done element by element where appropriate.
The result has the unit 1, if Number has a unit. Otherwise, it has no unit.
The real logarithm function is calculated for a real argument. Number must then be positive. For each negative Number value, the function returns a void value. The result is of the 64-bit floating point value data type. The following illustration shows the course of the function:
If Number is complex, then the complex logarithm function is calculated. The result is then of the complex 64-bit floating point value data type. The following illustration shows the course of the absolute value of the function:
If the argument is a list, then the function is executed for each element of the list and the result is also a list.
Available in
FlexPro Basic, Professional, Developer Suite
Examples
Log(1.) |
Results in 0. |
Log(E) |
Results in 1. |
Log(-1.) |
Results in ?. |
Dim x |
Calculates a signal with the course of the curve in the interval [0, 5]. |