Various logarithmic and circular functions for brobs

Various elementary functions for brobs

Arguments

x

Object of class brob (or sometimes glub)

base

In function log(), the base of the logarithm

Details

For brobs: apart from abs(), log(), exp(), sinh() and cosh(), these functions return f(as.numeric(x)) so are numeric; the exceptional functions return brobs.

For glubs: mostly direct transliteration of the appropriate formula; one might note that log(z) is defined as glub(log(Mod(x)),Arg(x)).

Author

Robin K. S. Hankin

Examples

exp(as.brob(3000))  #exp(3000) is represented with zero error
#> [1] +exp(3000)