deletions | additions       diff --git a/smFRET data analysis.tex b/smFRET data analysis.tex  index 5d84ce2..39702dd 100644  --- a/smFRET data analysis.tex  +++ b/smFRET data analysis.tex 
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(table~\ref{tab:ph_sel_alex}).  The \verb|Ph_sel| class allows to express any combination of photon streams.   For example, in ALEX measurements, the D-emission during A-excitation stream is usually excluded because it does not contain any useful signal\cite{Lee_2005}. To indicate all but the photons in this photon stream we write \verb|Ph_sel(Dex='DAem', Aex='Aem')|, that litteraly means \textit{select donor and acceptor photons (DAem)during (DAem) during  donor excitation (Dex) and only acceptor photons (Aem) during acceptor excitation (Aex)}. \begin{table}  \begin{tabular}{l|l}