[daip] dftpl

[Eric Greisen]

Andreas Brunthaler wrote:
> 
> On Tue, Dec 9, 2008 at 12:55 AM, Eric Greisen <egreisen at nrao.edu 
> <mailto:egreisen at nrao.edu>> wrote:
> 
> 
>     This is a constant issue in all averaging tasks.  In this case,
>     DFTPL is attempting to make a regular grid in the time axis.  If you
>     ask for 10-sec averaging - the first bin is
>        t1 + 0  ->  t1 + 10
>     second bin
>        t1 + 10 ->  t1 + 20
>     etc.  Whatever data fall in a bin are plotted at the average of the
>     times that limit that bin.  I could think of better algorithms that
>     would make an irregular axis but that would involve a rewrite of the
>     code which may or may not be justified.
> 
> 
> Thank you. And t1 is the start of a scan or the start of the whole 
> experiment?
> 
> Regards,
> Andreas
T1 is the first time in the data set.

The task could be overhauled to plot using the actual data times - which 
I now prefer as an averaging method.  Thus each average interval starts 
with a data same at Ti and ends with the last sample at T < Ti+int.  The 
  next average starts with the first Tj > ti+int and goes to < Tj+int. 
That would force the task to be smarter in some ways and to keep an 
array of the real average times for the X axis.

Eric Greisen