typo correction

demo.m

@@ -9,7 +9,7 @@
 P.b     = 0;    % observation bias
 tau     = 1.5;    % decay time constant
 P.gam   = 1-V.dt/tau; % C(t) = gam*C(t-1)
-P.lam   = 0.1;  % firing rate = lam*dt
+P.lam   = 0.1;  % firing rate = lam/dt
 P.sig   = 0.1;  % standard deviation of observation noise 
 
 % simulate data