Operator Reference

HALCON Operator Reference / Tuple / Arithmetic
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tuple_logtuple_logTupleLogTupleLogtuple_log (Operator)

tuple_logtuple_logTupleLogTupleLogtuple_log — Compute the natural logarithm of a tuple.

Signature

tuple_log( : : T : Log)

Herror tuple_log(double T, double* Log)

Herror T_tuple_log(const Htuple T, Htuple* Log)

void TupleLog(const HTuple& T, HTuple* Log)

HTuple HTuple::TupleLog() const

static void HOperatorSet.TupleLog(HTuple t, out HTuple log)

HTuple HTuple.TupleLog()

def tuple_log(t: MaybeSequence[Union[float, int]]) -> Sequence[float]

def tuple_log_s(t: MaybeSequence[Union[float, int]]) -> float

Description

tuple_logtuple_logTupleLogTupleLogtuple_log computes the natural logarithm of the input tuple TTTtt. The natural logarithm is always returned as a floating point number. The natural logarithm of a string is not allowed.

Exception: Empty input tuple

If the input tuple is empty, the operator returns an empty tuple.

HDevelop In-line Operation

HDevelop provides an in-line operation for tuple_logtuple_logTupleLogTupleLogtuple_log, which can be used in an expression in the following syntax:

Log := log(T)

Execution Information

  • Multithreading type: independent (runs in parallel even with exclusive operators).
  • Multithreading scope: global (may be called from any thread).
  • Processed without parallelization.

Parameters

TTTtt (input_control)  number(-array) → HTupleMaybeSequence[Union[float, int]]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Input tuple.

Restriction: T > 0

LogLogLogloglog (output_control)  number(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)

Natural logarithm of the input tuple.

Alternatives

tuple_log2tuple_log2TupleLog2TupleLog2tuple_log2, tuple_log10tuple_log10TupleLog10TupleLog10tuple_log10

See also

tuple_exptuple_expTupleExpTupleExptuple_exp, tuple_exp2tuple_exp2TupleExp2TupleExp2tuple_exp2, tuple_exp10tuple_exp10TupleExp10TupleExp10tuple_exp10, tuple_powtuple_powTuplePowTuplePowtuple_pow

Module

Foundation

ClassesClasses | | Operators