The julia_port from cjen07

julia_port's Introduction

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"}]
end

remark: 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

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}

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