what is the importance of variables in a pca what is the importance of pca for user activity how important are variables in relation to user activity what is meant by the pca for user activities what is the importance of dimensionality in a pca what is the importance of variables in the activity pca how to calculate dimensions in user data when do you scale activity variables when calculating activity for a website, we should consider the following factors: why is a dimensionality reduction important what is the importance of pca how to find the activity index what are the two components of a variable which variable is an important component of the pca? why is pca useful why is an activity index important how to scale pca components for activity data what is the significance of the pca for activity which factor is a component of the pca why is the proportion of variance important