Principal Component Analysis (PCA)

NOTE: this article is only a template. Please add content!

add introductory 1-2 sentences here

Read First

PCA, is a way to create an index from a group of variables that are similar in the information that they provide. This allows maximizing the information we keep, without using variables that will cause multicolinearity, and without having to choose one variables among many.

Guidelines

• organize information on the topic into subsections. for each subsection, include a brief description / overview, with links to articles that provide details

The spatial principle of a PCA

In a space of 3 dimensions, that are for instance income in x, savings in y and consumption in z, we have let’s say 12 vectors that represent our 12 similar variables that were measured in the field. Those vectors combined together create a cloud in 3D. That cloud has 3 principal directions; the first 2 like the sticks of a kite, and a 3rd stick at 90 degrees from the first 2. Well, the longest of the sticks that represent the cloud, is the Principal Component.

Back to Parent

This article is part of the topic Data Analysis

Additional Resources

• list here other articles related to this topic, with a brief description and link