, 1 min read
Calling C from Julia
Original post is here eklausmeier.goip.de/blog/2020/06-23-calling-c-from-julia.
Two ways to compute the error function or Bessel function in Julia.
1. Calling C. On UNIX libm
provides erf()
and j0()
. So calling them goes like this:
ccall(("erf","libm.so.6"),Float64,(Float64,),0.1)
ccall(("j0"),Float64,(Float64,),3)
In this case one can omit the reference to libm.so
. Watch out for the funny looking (Float64,)
.
2. Using Julia. SpecialFunctions.jl provides erf()
and besselj0
.
import Pkg
Pkg.add("SpecialFunctions")
import SpecialFunctions
SpecialFunctions.erf(0.1)
SpecialFunctions.besselj0(3)