Log {gsl} | R Documentation |
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
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)
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. |
Robin K. S. Hankin
http://www.gnu.org/software/gsl
x <- seq(from=0.1,to=2,by=0.01) log(x) #table 7.5 of Ab and St