If you are just hacking around, please put your code in scripts -- it's for any one-off analysis or snippet of code that isn't yet ready for reuse by other people. We recommend using scripts/demo_script.py as a guide for the types of operations that you may find useful.
The tests/ directory is intended for unit tests that run automatically with pytest.
If your data is in Signal format, put it in the signals/ directory. If it is not yet signal form, you may want to make a conversion script in scripts/ that is able convert your data from your custom format into a Signal.
Below is some pseudocode for a script that converts your data from a custom format and then save it as a Signal to make it easier for other people to use.
from nems.signal import Signal
numpy_array = load_my_custom_data_format(...)
sig = Signal(matrix=numpy_array,
name='mysignal',
recording='some-string',
fs=200 # Hz
)
sig.save('../signals/my-new-signal')