pracma (version 1.9.9)

fzsolve: Complex Root Finding

Description

Find the root of a complex function

Usage

fzsolve(fz, z0)

Arguments

fz

complex(-analytic) function.

z0

complex point near the assumed root.

Value

Complex point with sufficiently small function value.

Details

fzsolve tries to find the root of the complex and relatively smooth (i.e., analytic) function near a starting point.

The function is considered as real function R^2 --> R^2 and the newtonsys function is applied.

See Also

newtonsys

Examples

fz <- function(z) sin(z)^2 + sqrt(z) - log(z)
fzsolve(fz, 1+1i)
# 0.2555197+0.8948303i