freemat/trusty,now 4.0-5build1 i386 [installed]
  mathematics framework (mostly matlab compatible)

freemat-data/trusty,now 4.0-5build1 all [installed,automatic]
  freemat data files

freemat-help/trusty,now 4.0-5build1 all [installed,automatic]
  freemat help files

$ apt policy freemat
freemat:
  Installed: (none)
  Candidate: 4.2+dfsg1-6
  Version table:
     4.2+dfsg1-6 500
        500 http://no.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages

sudo apt-get purge freemat freemat-data freemat-help

sudo apt-get install build-essential git devscripts python-all-dev llvm-dev doxygen libffi-dev libboost-math-dev libclang-dev libedit-dev xvfb

sudo apt-get build-dep freemat

git clone -b debian/4.2+dfsg1-6 https://salsa.debian.org/science-team/freemat.git

cd freemat
rm debian/source/format # to support compilation on 14.04
rm -rf tests/ # remove tests
mkdir tests/ # create empty tests directory
dpkg-buildpackage -uc -us -d

sudo apt-get install libjs-jquery
sudo dpkg -i ../freemat*.deb