# Similarity Comparison to Determine Accuracy

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mustafa can Kurt on 25 Dec 2021
Commented: William Rose on 28 Dec 2021
This recording has 8 repetation of an egzersize. First 4 repetation (marked with red) are correct and the last 4 repetation (marked with green) are wrong. With only using correct repetations, how to determine the accuracy of any other recordings?
In other words I want to detect; are the repetations correct or not with comparing to the correct data set. It looks like the prominance and the width of the repetations are changing in terms of accuracy. Any idea how to make that comparison between the given data set behaviour?

William Rose on 25 Dec 2021
The image you provided only shows two bad and two good examples. Even if we had four examples of each, this may not be enough examples to determine what distinguishes correct from incorrect, unless you can provide more information.
Each sample has four marked peaks. Each peak shows two marked features: prominence and width. We do not know if these are the only features that distinguish a correct from an incorrect peak. Other possibly important features are risetime, max(dx/dt), and so on. What is the significance of four peaks per sample? Can each peak be graded apart from the others, or is there something about the set of four which is important? For example, is it important to be consistent within the set, or is it important that a certain feature always increase within the set? Does the order matter? In other words, if you mixed up the order of a correct set of four, would it still be a correct set?
Why are there no marked peaks in the second row recording? Why does the red-circled set in row three begin with the second marked peak, and not the first? Can we start a set of four at any peak? Are weallowed to compare overlapping sets of four peaks?
These are jut a few of thee questions that one can think of for distinguishing a good versus a bad set.
With a larger data set, it might be possible to infer answers to these questions. But with only two or four examples of each, it will be qute difficult. Please provide more information and more examples of correct and incorrect sets.
William Rose on 28 Dec 2021
@mustafa can Kurt, You are welcome. Good luck with your work.

R2021a

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