roots: One Dimensional Multiple Roots (Zero) Finding

In IRSN/DiceView: Methods for Visualization of Computer Experiments Design and Surrogate

One Dimensional Multiple Roots (Zero) Finding

Description

Search multiple roots of 1D function, sampled/splitted by a (1D) mesh

Usage

roots(
  f,
  vectorized = FALSE,
  interval,
  maxerror_f = 1e-07,
  split = "seq",
  split.size = 11,
  tol = .Machine$double.eps^0.25,
  .lapply = parallel::mclapply,
  ...
)

Arguments

f	Function to find roots
vectorized	boolean: is f already vectorized ? (default: FALSE) or if function: vectorized version of f.
interval	bounds to inverse in
maxerror_f	the maximum error on f evaluation (iterates over uniroot to converge).
split	function or "unif" or "seq" (default) to preform interval partition
split.size	number of parts to perform uniroot inside
tol	the desired accuracy (convergence tolerance on f arg).
.lapply	control the loop/vectorization over different roots (defaults to multicore apply).
...	additional named or unnamed arguments to be passed to f.

Value

array of x, so f(x)=target

Examples

roots(sin,interval=c(pi/2,5*pi/2))
roots(sin,interval=c(pi/2,1.5*pi/2))

f=function(x)exp(x)-1;
f(roots(f,interval=c(-1,2)))

f=function(x)exp(1000*x)-1;
f(roots(f,interval=c(-1,2)))

IRSN/DiceView documentation built on Jan. 31, 2024, 10:09 a.m.