log1pw(3m) [hpux man page]

log1p(3M)																 log1p(3M)

NAME

       log1p(), log1pf(), log1pl(), log1pw(), log1pq() - natural logarithm of one-plus-argument functions

SYNOPSIS

   HP Integrity Server Only
DESCRIPTION

       The function computes the logarithmic function but may be more accurate for very small values of x.

       The and functions are useful to guarantee that financial calculations of are accurate when x is very small, namely:

       The preceding example would be applicable when calculating small daily interest rates.  See also and

   Integrity Server Only
       is a version of it takes a argument and returns a result.

       is a version of it takes a argument and returns a result.

       is an version of it takes an argument and returns an result.

       is equivalent to on HP-UX systems.

USAGE

       To use these functions, compile either with the default option or with the and options.

       To use (for Integrity servers) or compile also with the option.

       Make sure your program includes and link in the math library by specifying on the compiler or linker command line.

       For more information, see the at the following site:

RETURN VALUE

       If x is +INFINITY, returns +INFINITY.

       If x = -1.0, returns (equal to -INFINITY) and raises the divide-by-zero exception.

       If x < -1.0, returns NaN and raises the invalid exception.

       If x is NaN, returns NaN.

       When it raises no other exception, whether raises the inexact exception is unspecified.

ERRORS

       If x < -1.0, sets to

   Integrity Server Only
       HP-UX functions on Integrity servers do not set by default.  For setting, compile with the option.

SEE ALSO

       annuity(3M), compound(3M), expm1(3M), log(3M), math(5).

STANDARDS CONFORMANCE

       : XPG4.2, ANSI C, ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

       : ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

																	 log1p(3M)

expm1(3M)																 expm1(3M)

NAME

       expm1(), expm1f(), expm1l(), expm1w(), expm1q() - exponential minus 1 functions

SYNOPSIS

   HP Integrity Server Only
DESCRIPTION

       The function is equivalent to - 1, but may be more accurate for very small values of x.

       The and functions are useful to guarantee that financial calculations of (((1+x)**n)-1)/x are accurate when x is very small, namely:

       The preceding example might be applicable when calculating small daily interest rates.

       See also

   Integrity Server Only
       is a version of it takes a argument and returns a result.

       is a version of it takes a argument and returns a result.

       is an version of it takes an argument and returns an result.

       is equivalent to on HP-UX systems.

USAGE

       To use these functions, compile either with the default option or with the and options.

       To use (for Integrity servers) or compile also with the option.

       Make sure your program includes and link in the math library by specifying on the compiler or linker command line.

       For more information, see the at the following site:

RETURN VALUE

       If x is +INFINITY, returns +INFINITY.

       If x is -INFINITY, returns -1.0.

       If x is NaN, returns NaN.

       returns infinity (equal to in lieu of a value whose magnitude is too large, and raises the overflow and inexact exceptions.

       When it raises no other exception, whether raises the inexact exception is unspecified.

ERRORS

       If the correct value would overflow, sets to [ERANGE].

   Integrity Server Only
       HP-UX functions on Integrity server do not set by default.  For setting, compile with the option.

SEE ALSO

       annuity(3M), compound(3M), exp(3M), log1p(3M), math(5).

STANDARDS CONFORMANCE

       : XPG4.2, ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

       : ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

																	 expm1(3M)