Component Analysis Flanders' FOOD Form

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StatQuest breaks it down into bite-sized pieces hooray Hello, I'm Josh stormer and welcome to stat quest in this StatQuest We're going to go through principle component analysis PCA one step at a time using singular value decomposition SVD You'll learn about what PCA does How it does it and how to use it to get deeper insight into your data Let's start with a simple dataset We've measured the transcription of two genes gene 1 and gene 2 in 6 different mice Note if you're not into mice and genes think of the mice as individual samples and The genes as variables that we measure for each sample For example the samples could be students in high school and the variables could be test scores in math and reading Or the samples could be businesses, and the variables could be market capitalization and the number of employees Ok now we're back to mice and genes because I'm a geneticist and I work in a genetics department if We only measure one gene. We can plot the data on a number line mice 1