st	the stimulus at time t.
T	length of the experiment, in time bins.
nt	spike train of the ganglion cell, discretized into spike counts per time bin.
b ∈ ℝ	an offset parameter that sets the neuron's baseline firing rate.
k	the ganglion cell's receptive field, a linear filter acting on the stimulus st.
k.st	the dot product of the ganglion cell's receptive field with the stimulus.
Nspikes	the total number of spikes recorded from the ganglion cell.
$\mathbf{\text{STA}}=\frac{1}{N_{\mathit{\text{spikes}}}}{\sum }_t{\mathit{n}}_t{s}_t$	the spike triggered average of the ganglion cell.