deletions | additions       diff --git a/dataload.tex b/dataload.tex  index bf8a1dc..ae7b057 100644  --- a/dataload.tex  +++ b/dataload.tex 
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The functions   \verb|plot_alternation_hist| (\href{http://fretbursts.readthedocs.org/en/latest/plots.html#fretbursts.burst\_plot.plot\_alternation\_hist}{documentation})  and \verb|plot_alternation_hist_nsalex| (\href{http://fretbursts.readthedocs.org/en/latest/plots.html#fretbursts.burst\_plot.plot\_alternation\_hist\_nsalex}{documentation})  plot plots  the alternation histogram(or the nanotime histogram)  with the currently selected donor and acceptor excitation periods  (if no selection has been made yet, default values will be shown).  Figure~\ref{fig:altern_hist} shows a typical alternation histogram for 
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be applied with:  \begin{verbatim}  loader.usalex_apply_period(d) loader.alex_apply_period(d)  \end{verbatim}  After this command, only the photons inside excitation periods  will be present in \verb|d| and to apply a different alternation   period definition the file must be reloaded.  For ns-ALEX measurement there is an analogical function  named \verb|plot_alternation_hist_nsalex| (\href{http://fretbursts.readthedocs.org/en/latest/plots.html#fretbursts.burst\_plot.plot\_alternation\_hist\_nsalex}{documentation})  that plots the nanotime histogram and the current selection  for the donor and acceptor excitation periods. The periods are defined  and applied following the same syntax as for µs-ALEX.