OpenJij : Framework for the Ising model and QUBO.

cmake >= 3.11

• Tutorials
• Documents

install

pip

$ pip install openjij

cmake setup

If you had not installed cmake>=3.11, you need install cmake>=3.11

macOS

$ brew install cmake

Linux

# if you installed old version by apt-get
$ apt-get purge cmake

# install cmake 
$ wget https://cmake.org/files/v3.13/cmake-3.13.2.tar.gz
$ tar xvf cmake-3.13.2.tar.gz
$ cd cmake-3.13.2
$ ./bootstrap && make && sudo make install 

Install openjij

$ git clone [email protected]:OpenJij/OpenJij.git
$ cd openjij
$ python setup.py install

How to use

Python example

import openjij as oj
sampler = oj.SASampler()
response = sampler.sample_ising(h={0: -1}, J={(0,1): -1})
response.states
# [[1,1]]

# with indices
response = sampler.sample_ising(h={'a': -1}, J={('a','b'): 1})
[{index: s for index, s in zip(response.indices, state)} for state in response.states]
# [{'b': -1, 'a': 1}]

Community

• OpenJij Slack