Chapter 8 Introduction to PCA
In this book Principal Component Analysis (PCA) is used several times. This chapter will shortly explain the theory behind PCA and the interpretation of relevant plots.
PCA is a tool for looking a correlation structure between variables, and groupings of samples. All through visualizations.
Check out youtube on the subject for an introduction.
[TILFØJ: skrives kort om PCA, skal der ikke stå lidt mere???]
knitr::include_url("https://youtube.com/embed/NFIkD9-MuTY") #{width="90%"}[INDSÆTTE: flere film // you tube klip]