How to statistically detect "trend outliers"?

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pietro
pietro 2014-11-27
编辑： pietro 2014-11-27
Hi all,
I have several data collected by experiments that show the dependency between two variables, let's say x and y. I have one trend for each experiment because the x is continously varied during the experiment. In the following link you can see a plot with all the experiments collected.
<http://s27.postimg.org/x61xxcs0j/lines.jpg>
As you can see there are more spiky trends or trends with a peak placed in a different location than others. These may be outliers and in case I have to identify them and remove the full trend.
Is there any statically way to remove line outliers that I can implement in matlab? Also a paper with the methodology may be fine.
Thank you
best regards
Pietro

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