1. Natural logarithm LN
1.1. Instruction Description#
The instruction performs natural logarithm calculation on the values in (IN) and places the result in (OUT).
To obtain a base 10 logarithm from natural logarithm, divide the natural logarithm by 2.302585 (approximately equal to the natural logarithm of 10).
To elevate any real number to a power of another real number, including fractional exponentiation: combine the "natural exponent" instruction with the "natural logarithm" instruction. For example, to raise X to a power of Y, enter the following command: EXP (Y * LN (X)).
1.2. The valid operands of the instruction#
| Input/Output | Data Type | operand | Description |
|---|---|---|---|
| IN | 32-bit real number | D/K/FD, local variable (LF) | input |
| OUT | 32-bit real number | D/FD, local variable (LF) | output |
1.3. Example#
command table:
NETWORK 000
LD X000
LN D0 D2 // LN（D0D1） = D2D3
图1 LN
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