Event random seed smaller than 0

[chenghuzi]

Not sure if my understanding is correct. But if one loads drives from the parameter file default.json, since we have

    "prng_seedcore_input_prox": 2,
    "prng_seedcore_input_dist": 2,
    "prng_seedcore_extpois": 2,
    "prng_seedcore_extgauss": 2,
    "prng_seedcore_evprox_1": 2,
    "prng_seedcore_evdist_1": 2,
    "prng_seedcore_evprox_2": 2,
    "prng_seedcore_evdist_2": 0,

and in params.py we have

hnn-core/hnn_core/params.py

Line 223 in bab8196

drive['event_seed'] = par['prng_seedcore'] - 18

If we run Network(params, add_drives_from_params=True) and before

hnn-core/hnn_core/drives.py

Line 135 in bab8196

if specs['type'] == 'evoked':

we insert

print(specs['type'], drive_name, specs['event_seed'])

the output will be

it seems that the corresponding resulting event_seed could be -16 and thus cause errors in running simulation as the seed is smaller than 0

[jasmainak]

uffff ... @rythorpe I need your help here :-)

[rythorpe]

These values are set this way to maintain consistency with our previous "ground truth" default current dipole simulation. After these values get summed with the trial index and cell's GID (specifically for cell-specific, non-synchronous drives), the seed value that gets passed to the random number generator should be positive.

[jasmainak]

but now the seeds are determined by the cell's GID minus the GID of the first cell of that cell type. Is this still relevant in that case?

[rythorpe]

Oh yes, I had forgotten about that. We updated the event_seed values in add_erp_drives_to_jones_model(); however, I'm guessing that we forgot to update them in default.json and _extract_drive_specs_from_hnn_params().