[Kst] [Bug 117897] New plugin to bin one vector w.r.t. another

netterfield@astro.utoronto.ca netterfield at astro.utoronto.ca
Thu Jan 5 07:33:58 CET 2006

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------- Additional Comments From netterfield astro utoronto ca  2006-01-05 07:33 -------
I'm going to be pretty swamped over the next couple weeks...

The tricky bit is the error bars.  In the absense of an antialiasing filter 
(ie, virtually never) you could just take the standard deviation in each bin 
as the error bar.  But with an antialiasing filter, which correlates 
successive samples this will be substantially wrong.

A heuristic I have used to get around this that has worked very well is to 
average all successive samples which are in the same bin into one sample, and 
then base the error bars on the distribution of these averages.

This can suffer from small number statistic if you don't have enough visits to 
a bin.  A solution is to calculate both types of error bars, calculate the 
mean scale factor to correct the per-sample error bar, and apply this to the 
per-sample error bars.

I would be happy to discuss this more.


On January 4, 2006 04:19 pm, Andrew Walker wrote:
[bugs.kde.org quoted mail]

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