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BOLD initialization : avoid divide by zero with default params #262

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BOLD initialization : avoid divide by zero with default params #262

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4 changes: 2 additions & 2 deletions neurolib/models/bold/timeIntegration.py
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Original file line number Diff line number Diff line change
Expand Up @@ -99,12 +99,12 @@ def integrateBOLD_numba(BOLD, X, Q, F, V, Z, dt, N, rho, alpha, V0, k1, k2, k3,
for i in range(len(Z[0, :])): # loop over all timesteps
# component-wise loop for compatibilty with numba
for j in range(N): # loop over all areas
F[j] = max(F[j], EPS)

X[j] = X[j] + dt * (Z[j, i] - K[j] * X[j] - Gamma[j] * (F[j] - 1))
Q[j] = Q[j] + dt / Tau[j] * (F[j] / rho * (1 - (1 - rho) ** (1 / F[j])) - Q[j] * V[j] ** (1 / alpha - 1))
V[j] = V[j] + dt / Tau[j] * (F[j] - V[j] ** (1 / alpha))
F[j] = F[j] + dt * X[j]

F[j] = max(F[j], EPS)

BOLD[j, i] = V0 * (k1 * (1 - Q[j]) + k2 * (1 - Q[j] / V[j]) + k3 * (1 - V[j]))
return BOLD, X, F, Q, V