more data mining and machine learning techniques in this we talk about few more data mining and machine learning techniques we will talk about really simple technique called -nearest neighbors (knnwe'll then use knn to predict rating for movie after thatwe'll go on to talk about dimensionality reduction and principal component analysis we'll also look at an example of pca where we will reduce data to two dimensions while still preserving its variance we'll then walk through the concept of data warehousing and see the advantages of the newer elt process over the etl process we'll learn the fun concept of reinforcement learning and see the technique used behind the intelligent pac-man agent of the pac-man game lastlywe'll see some fancy terminology used for reinforcement learning we'll cover the following topicsthe concept of -nearest neighbors implementation of knn to predict the rating of movie dimensionality reduction and principal component analysis example of pca with the iris dataset data warehousing and etl versus elt what is reinforcement learning the working behind the intelligent pac-man game some fancy words used for reinforcement learning