# Applying PC rotation obtained from centered data to un-centered data

Let $X$ be an $n\times p$ matrix. We obtain a matrix $Z$ by removing the mean from each column of $X$.

Let $Z=UDV^T$. Principal components are $Z \cdot V$. What is the interpretation of $X \cdot V$?

• If this is homework or self-study please add the self-study and tell us what you have tried and where you are stuck. – mdewey Aug 16 '16 at 7:57
• – ttnphns Aug 16 '16 at 9:55