How to calculate sway area rate for center of pressure

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Hello, i want to calculate sway area (mm2 /s) which is defined as the area enclosed by the center-of-pressure trajectory per unit time. Some useful paper (find below). Please find attached the CoPx and CoPy data.
Hufschmidt A, Dichgans J, Mauritz H, Hufschmidt M (1980) Some methods and parameters of body sway quantifcation and their neurological applications. Arch Psyc Nervenkr 228:135–150
Prieto TE, Myklebust JB, Hofman RG, Lovett EG, Myklebust BM (1996) Measures of postural steadiness: differences between healthy young and elderly adults. IEEE Trans Biomed Eng 43:956–966

Accepted Answer

William Rose
William Rose on 8 Sep 2022
Since you already have the data in Excel. there is no need for Matlab. Do the calculation in Excel, using equation 19 of Prieto et al., 1996.
When I opened the file you attached, I received a warning message: "External links have beeen disabled", and the data do not look like COP data. There are no headers and the first row is at time=0.006. Therefore I have not analyzed the data in the spreadsheet you uploaded.
I am attaching an Excel file that demonstrates the calculation of Sway Area using equation 19 of Prieto et al., 1996.
Good luck.

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More Answers (1)

William Rose
William Rose on 9 Sep 2022
@chris pamp, You are welcome. Best wishes for your research.


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