Computes the base X logarithm of a specified input value.

(**x**>0, **y**>0). If **y** is 0, the output is -
$\infty $. When **x** and **y** are both non-complex and **x** is less than or equal to 0, or **y** is less than 0, the output is not a number (NaN).

## y

An input to this operation.

This input supports scalar numbers, arrays or clusters of numbers, and arrays of clusters of numbers.

Data Type Changes on FPGA

When you use this node on the FPGA or simulated FPGA, the data type for this input changes to a fixed-point number. This change allows LabVIEW to know the size of the input at compile time.

## x

An input to this operation.

This input supports scalar numbers, arrays or clusters of numbers, and arrays of clusters of numbers.

Data Type Changes on FPGA

When you use this node on the FPGA or simulated FPGA, the data type for this input changes to a fixed-point number. This change allows LabVIEW to know the size of the input at compile time.

## logx(y)

Logarithm of **y** to the base **x**.

When

**x** and

**y** are complex, the following equation defines

**logx(y)**:

$\mathrm{log}x(y)=\frac{\mathrm{ln}(y)}{\mathrm{ln}(x)}$

Refer to the Natural Logarithm node for more information.

**Installed By: **LabVIEW Communications System Design Suite (introduced in 1.0)

**Where This Node Can Run: **

Desktop OS: Windows

FPGA: All devices (only within an FPGA Algorithm)