Log: Log functions

In gsl: Wrapper for the Gnu Scientific Library

Log functions

Description

Log functions as per the Gnu Scientific Library, reference manual section 7.25 and AMS-55, chapter 4. These functions are declared in header file gsl_sf_log.h

Usage

gsl_sf_log(x, give=FALSE, strict=TRUE)
log_abs(x, give=FALSE, strict=TRUE)
complex_log(zr, zi=NULL, r.and.i=TRUE, give=FALSE, strict=TRUE)
log_1plusx(x, give=FALSE, strict=TRUE)
log_1plusx_mx(x, give=FALSE, strict=TRUE)

Arguments

x	input: real values
zr	In complex_log(), the real part of the argument
zi	In complex_log(), the imaginary part of the argument. If missing (ie takes the default value of NULL), interpret zr as complex, even if real
r.and.i	In complex_log(), Boolean variable with default value of TRUE meaning to return a complex variable as per the details section below; and FALSE meaning to return the values as advertised in the GSL manual
give	Boolean with TRUE meaning to return a list of three items: the value, an estimate of the error, and a status number
strict	Boolean, with TRUE meaning to return NaN if status is an error

Author(s)

Robin K. S. Hankin

References

https://www.gnu.org/software/gsl/

Examples

x <- seq(from=0.1,to=2,by=0.01)
log(x)   #table 7.5 of Ab and St

gsl documentation built on Feb. 16, 2023, 10:32 p.m.