How can identify the incorrect data array from a graph?
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I have a bunch of (30) data arrays (they are all 1 x 2218 arrays) and I have plotted them to show something like this:
In these plots it is clear to see the data arrays that do not follow the pattern (the purple, red and yellow ones that are lower than the other lines).
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1415694/image.png)
My initial idea was, after looking at the plot, to find all data arrays that had a value below 50 (for this specific case). But this would miss the yello and red pulse.
I have also thought of simply, dragging the mouse atop of these lines and identify specific xy-coordinates for these specific lines and have these found and eliminated, but this would be quite a slow technique and could be a bit problematic if the lines were too close to each other.
Is there any sort of filter I can apply, or another technique, that cleans all the incorrect data pulses/lines?
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Richard Burnside
2023 年 6 月 20 日
A very simplistic approach might to take the standard deviation of the all the data at each x value and and look for the outliers.
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