project fixes, methods figure

projects/project_adaptation_fit/adaptation_fit.tex

@@ -42,7 +42,8 @@ electroreceptors of the weakly electric fish \textit{Apteronotus
   \question In the accompanying datasets you find the
   \textit{spike\_times} of an P-unit electrorecptor to a stimulus of a
   certain intensity, i.e. the \textit{contrast} which is also stored
-  in the file.
+  in the file. The data is sampled with 20\,kHz sampling frequency and
+  spike times are given in milliseconds relative to the stimulus onset.
   \begin{parts}
     \part Estimate for each stimulus intensity the PSTH and plot
     it. You will see that there are three parts.  (i) The first