how to classify hand written data how does pca classification work how to use pca for classification how does pca work how many digits for pca how to classify digits pca how is pca used in classification how do you classify handwritten data in pca how to classify digits with pca how to classify digits in pca database how to classify handwritten digits using pca how do you classify digits using pca how to classify digits with pca how does pag work can pca be used as a classifier how to classify an array of hand written digits pca for classification how many digits for the train phase how to use pca what is the pca used for