32.17.9.3 Explanation of the LN and LNP Instructions
The LN and LNP instructions are logarithmic instructions. The LN
instruction calculates the natural logarithmic function of S1 and
stores the result in D1. The result in D1 is output as a real value
where e raised to the power of D1 equals S1.
Equation: D1 = logeS1
Pi is approximately 2.7182818284590 (real number).
The LN and LNP instructions are always conducted. When using the
LN and LNP instructions, an error will occur if the variables
specified in operands S1 and D1 are not the same type. Designate
the same variable type in all operands S1 and D1.
Refer to the following for specifying a constant.
When operand D1 is a float variable
When 0f (zero and lower case "f") is input, the following values
are interpreted as float values.
When operand D1 is a real variable
When 0r (zero and lower case "r") is input, the following values
are interpreted as real values.
When calculating data in a specified
array
Specify the array using Data [0] or Data [N] (N indicates an
integer variable).
When operands S1 and D1 specify the entire array, an error will
occur even if the specified variables are the same type.
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