![[Featured Image] A group of learners looks intently at their computer screens as they interpret the results of principal component analysis as part of their coursework.](https://images.ctfassets.net/wp1lcwdav1p1/52rvXYrUeZAzw1AOhs88RA/81a36e1e1452ee8603edd14b07ef1e99/GettyImages-2275779462-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
Principal Component Analysis (PCA): Definition, How It Works, and Why It Matters
Learn about principal component analysis, including how it works and its real-world applications in areas such as machine learning and data visualization.
September 22, 2026
Article

![[Featured Image] A data analyst using an OLS regression model looks at a computer screen in a data center.](https://images.ctfassets.net/wp1lcwdav1p1/5De6D00FTOpwdwQraWOHJz/b66381ea08254d84e38750c1c045e227/GettyImages-2265894385-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured Image] A young professional works to improve their AI literacy by experimenting with different types of prompts while working with an AI tool on their laptop at home.](https://images.ctfassets.net/wp1lcwdav1p1/5uoWkFHoUGAHBxl1nsZ3MS/a139d3d2c17cde5c40ba6b8b2e7bd9c4/GettyImages-2224658239-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)

![[Featured Image] A developer works at a computer, using various resources to build AI agents.](https://images.ctfassets.net/wp1lcwdav1p1/6Fol5JNePbPq8fqhONfhtX/ad6a2135fe241cf9f9f8e36ba07034e9/GettyImages-2270721832-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured Image] A programmer uses AI coding as they sit in front of a computer screen in an open office.](https://images.ctfassets.net/wp1lcwdav1p1/63l3v38D6pQmlxnSQzYLdt/17d5a5ec412f73d533c4d3fbd96456a4/GettyImages-2028996130-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured Image] Side view of a software developer using AI, such as Claude Sonnet, to resolve issues with the code they are working on.](https://images.ctfassets.net/wp1lcwdav1p1/1RC69wLwKIEY83akKTelHi/dbb873cbff802ee607ad6cf173ee0c58/GettyImages-1150342651-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured image] A professional trained in AI strategy consulting stands at the head of a conference room and speaks to a team seated at a table. A large screen is mounted on the wall behind the consultant, displaying the words, "AI business solutions."](https://images.ctfassets.net/wp1lcwdav1p1/3wA7pUV7xgQIB8CzMKt69N/c948dae8fa26f304bc58d6218392bcb0/GettyImages-2241286196-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![Featured Image]: A person wearing headphones works on a laptop, using a program that looks like Claude Code.](https://images.ctfassets.net/wp1lcwdav1p1/QoTxJcOhIiQMH6uo4lgBc/6b25aa0af0f0523f3a411d2507143956/GettyImages-2284973806.jpg?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured Image] An online learner studies the Bernoulli distribution at home, learning about the equation and how to use it.](https://images.ctfassets.net/wp1lcwdav1p1/3e5cm4vVxtH4CJJ65Ti8a3/d2494f5ed160595234cc8ab630db984f/GettyImages-1600877824-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured Image] A classroom of learners studies data validation and learns about best practices throughout the data lifecycle.](https://images.ctfassets.net/wp1lcwdav1p1/36XT7YbXMStG4jkR8FxY6J/ed27832fae06e9dba08219a9913f5e00/GettyImages-2244174602-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured Image] A professional wearing glasses and a pensive expression thinks about what they are learning as part of the AI boot camp they are taking.](https://images.ctfassets.net/wp1lcwdav1p1/27QpT0Ly7ihCSMufnyX9Y1/160be07fef581eab91665597df4550c9/GettyImages-1347490724-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)
![[Featured Image] An AI-generated image of a person sitting on a couch, knitting, with a lion lying on the floor in front of them is an example of AI slop.](https://images.ctfassets.net/wp1lcwdav1p1/7ztzmCs7h4C2e0yGZ49zRC/45bd62d1aafaa860511425b4b5ee33ba/GettyImages-131226924-converted-from-jpg.webp?w=330&h=216&q=60&fit=fill&f=faces&fm=jpg&fl=progressive)

