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Dimensionality reduction based on distance preservation to local mean for symmetric positive definite matrices

License: GNU General Public License v3.0

MATLAB 100.00%
dimensionality-reduction manifold spd

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Problem: The result is not unique

Hi,

I am using your toolbox for dimensionality reduction of SPD matrices. And I use the method of FGMDM classification for two-class Motor Imagery BCI. I use the datasetⅠ from the BCI competition IV. The time interval is restricted to the time segment comprised between 0.5 and 2.5s.

However, the result I calculated is not unique (When I run it every time, the value of U is different). Do you know where the problem is? I hope to get your reply as soon as possible.

Thank you

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