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Natural Logarithm (G Dataflow)

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Last Modified: January 12, 2018

Computes the base e natural logarithm of a specified input value.

If x is 0, ln is - ∞ . If x is not complex and is less than 0, ln is not a number (NaN).

For very small values of x, Natural Logarithm (Arg +1) is more accurate than adding 1 to x then using this node.

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x

An input to this operation.

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

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ln

Result of the operation.

This output assumes the same numeric representation as x. When x is of the form x = a + bi, that is, when x is complex, the following equation defines the natural logarithm ln:
ln ⁡ ( x ) = ln ⁡ ( | x | ) + i ⁢ arg ⁡ ( x )
where arg( x) is the phase of x over the interval − π < arg ⁡ ( x ) ≤ π . In other words, the output uses the following equation:
ln ⁡ ( x ) = ln ( a 2 + b 2 ) + i ⁢ arctan 2 ( b , a )

Where This Node Can Run:

Desktop OS: Windows

FPGA: All devices (only within an optimized FPGA VI)

Web Server: Not supported in VIs that run in a web application

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