can you use a pca to analyze multiple observations how many cases in a pca table how many variables are in a pca can i use a pca every year how many variables can be used in a pca in different periods can you use pca analysis in a table of observations? when do you need to analyze all the cases in the pca is it possible to use a pca for a year? how many variables can use the pca when to use pca with same data can you do a pca with the same case in different period how to do pca with same data can you run pca and samples when do you use the same pca in the same year how to use pca for predicting variable how many people do i have to have to make a pca? how many pca for a year how many observations in the pca when does pca come out can you use the same pca for a year?