Exponential Distribution

• How long you have to wait for something after the it has happened once already
• Average rate /unit reference time
• PDF $p(x)=\lambda e^{-\lambda x}$ and $x\ge 0$
• Expectation $E(X)=\frac{1}{\lambda }$
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• Rate : $\hat{\lambda }=\frac{1}{N-1}{\Sigma }_{i=1,\dots ,N}{t}_{i+1}-t_i$
• Spiking Networks