Why it is necessary to standardize the data in PCA

pca

#1

I was studying about the PCA and I came to know that before applying PCA, we need to standardize the data by normalizing the data.

Can some one please explain the reason, why do we need to standardize the data before applying the PCA technique


#2

@hinduja1234,

You can refer this thread, similar discussion…

http://discuss.analyticsvidhya.com/t/why-do-the-variables-have-to-be-standardised-prior-to-applying-pca/2577

Regards,
Sunil


#3