anchor.diff:           pandas \
            nose \
            sphinx \
  -         autopep8 \
  -         flake8 \
            flufl.lock \
            ply \
            pytest \
            six \
  -         PyQt5 \
  -         spyder \
            urllib3 \
            ipython \
            jupyter \
  
positive.code:         octave-info && \
      pip install sympy && \
      octave --eval 'pkg install -forge symbolic odepkg' && \
      curl -L https://goo.gl/ExjLDP | bsdtar zxf - -C /usr/local --strip-components 2 && \
      ln -s -f /usr/local/MATLAB/R2017a/bin/glnxa64/mlint /usr/local/bin && \
      apt-get install -y --no-install-recommends \
          python3-pip \
          python3-dev \
  
negative.code:         liblapack-dev \
          libmpich-dev \
          libopenblas-dev \
          mpich && \
      apt-get install -y --no-install-recommends \
          octave \
          gnuplot-x11 \
  