fix PCA
fix PCA

I found the mean of the individual clusters and subtracted,
I fixed the mistake -  now I am summing over all x and y elements.

Signed-off-by: Aditya A Prasad <5c5d1de3672d25c1ad997cc5b3c40a32c347e962@gmail.com>

Aditya8795/PatternRecognition