Root finding with zero lower bound

General Usage
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1

Hi,

I want to use:
find_zero((f,fp), x_{0}, Roots.Newton())
for root finding. However, my domain is non-negative. Is there a way to impose this?
Thanks!

2

maybe a transformation?

using Roots
f(x) = log(x) - 3 #solution at f(x) = 0 at x = exp(3) 
g(x) = f(x*x)
x_squared = find_zero(f,1.4)
x = sqrt(x_squared)
2 Likes
3

Instead of using Roots, you can use Optim with the LFBGS method which allows to set bounds.