Added missing files for spike_trains

projects/project_fano_slope/fano_slope.tex

@@ -54,12 +54,12 @@
   \question You are recording the activity of a neuron in response to
   two different stimuli $I_1$ and $I_2$ (think of them, for example,
   of two sound waves with different intensities $I_1$ and $I_2$ and
-  you measure the activity af an auditory neuron). Within an
+  you measure the activity of an auditory neuron). Within an
   observation time of duration $W$ the neuron responds stochastically
   with $n$ spikes.
 
   How well can an upstream neuron discriminate the two stimuli based
-  on the spike counts $n$? How does this depend on the slope of the
+  on the spike count $n$? How does this depend on the slope of the
   tuning curve of the neural responses? How is this related to the
   fano factor (the ratio between the variance and the mean of the
   spike counts)?
@@ -77,20 +77,31 @@ input = 10.0;
 
 spikes = lifboltzmanspikes( trials, input, tmax, Dnoise, imax, ithresh, slope );
     \end{lstlisting}
-    The returned \texttt{spikes} is a cell array with \texttt{trials} elements, each being a vector
-    of spike times (in seconds) computed for a duration of \texttt{tmax} seconds.
-    The input is set via the \texttt{input} variable.
+    The returned \texttt{spikes} is a cell array with \texttt{trials}
+    elements, each being a vector of spike times (in seconds) computed
+    for a duration of \texttt{tmax} seconds.  The input is set via the
+    \texttt{input} variable.
+
+    Think of calling the \texttt{lifboltzmanspikes()} function as a
+    simple way of doing an electrophysiological experiment. You are
+    presenting a stimulus of constant intensity $I$ that you set. The
+    neuron responds to this stimulus, and you record this
+    response. After detecting the timepoints of the spikes in your
+    recordings you get what the \texttt{lifboltzmanspikes()} function
+    returns. The advantage over real data is, that you have the
+    possibility to simply modify the properties of the neuron via the
+    \texttt{Dnoise}, \texttt{imax}, \texttt{ithresh}, and
+    \texttt{slope} parameter.
 
     For the two inputs use $I_1=10$ and $I_2=I_1 + 1$.
 
-
   \begin{parts}
     \part 
     First, show two raster plots for the responses to the two
     differrent stimuli.
 
     \part Measure the tuning curve of the neuron with respect to the
-    input. That is, compute the mean firing rate as a function of the
+    input. That is, compute the mean firing rate (number of spikes within the recording time \texttt{tmax} divided by \texttt{tmax}) as a function of the
     input strength. Find an appropriate range of input values.  Do
     this for different values of the \texttt{slope} parameter (values
     between 0.1 and 2.0).

spike_trains/lecture/sta.py

@@ -80,8 +80,8 @@ def reconstruct_stimulus(spike_times, sta, stimulus, t_max=30., dt=1e-4):
 
 
 if __name__ == "__main__":
-    punit_data =  scio.loadmat('../../programming/exercises/p-unit_spike_times.mat')
-    punit_stim = scio.loadmat('../../programming/exercises/p-unit_stimulus.mat')
+    punit_data =  scio.loadmat('p-unit_spike_times.mat')
+    punit_stim = scio.loadmat('p-unit_stimulus.mat')
     spike_times = punit_data["spike_times"]
     stimulus = punit_stim["stimulus"]
     sta = plot_sta(spike_times, stimulus, 5e-5, -0.05, 0.05)