julia_port
example project to invoke julia functions in elixir to do scientific computing using port and metaprogramming
news
- support julia v1.0.1
- support elixir v1.7.3
- support erlang 21.0
- the script_test is supported
- the real_test is removed because it does not support julia v1.0.1
remarks
- the author will experiment with tensorflow.jl for good reason
prerequisite
- julia installed and its access from shell
Installation
the package can be installed
by adding julia_port to your list of dependencies in mix.exs:
def deps do
[{:julia_port, "~> 0.2.0"}]
endremark: if you install the package as a dependency, in order to run script_test,
you have to move ./deps/julia_port/julia and ./deps/julia_port/data to ./julia and ./data respectively
usage
- simple_test: arithmetics
def simple_test(port) do
port_send(port, "1+2")
IO.puts port_receive(port, true)
end- complex_test: linear algebra
use GenFunction, [rand: 2, sum: 1, *: 2]
def complex_test(port) do
rand(port, :a, 3, 3)
rand(port, :b, 3, 3)
JuliaPort.*(port, :c, :a, :b)
port_receive(port, false)
sum(port, :d, :c)
IO.puts port_receive(port, true)
end- script_test: linear regression
use GenFunction, [load_data: 1, lr_train: 2, lr_test: 3]
def script_test(port) do
include_script(port, "./julia/lr.jl")
load_data(port, {:x_train, :y_train}, "./data/train")
load_data(port, {:x_test, :y_test}, "./data/test")
lr_train(port, :beta, :x_train, :y_train)
port_receive(port, false)
lr_test(port, :error, :x_test, :y_test, :beta)
IO.puts port_receive(port, true)
end- run
iex -S mix
port = JuliaPort.init
# => #Port<0.5310>
JuliaPort.print_version port
# => received data: v"1.0.0"
JuliaPort.simple_test port
# => received data: 3
JuliaPort.complex_test port
# => received data: 5.710327361153192
JuliaPort.script_test port
# => received data: 0.9587912087912088
JuliaPort.terminate port
# => {#PID<0.143.0>, :close}