├── test
│   ├── coefficients-test.math
│   ├── main-test.math
│   ├── nearest-test.math
│   ├── rangek-test.math
│   └── wave-test.math
└── wde
    ├── coefficients.m
    ├── ???.m
    ├── nearest.m
    ├── rangek.m
    └── wave.m

#!/Applications/Mathematica.app/Contents/MacOS/MathematicaScript -script

$Path = Join[$Path, {Directory[]<>"/wde"}];
Needs["unit`"];
Needs["coefficients`"];