text mining

Question 1

terminology of text mining

Answer 1

a token/term: a word or a group of words
a document; one piece of text
a corpus; a collection of documents

Question 2

Document term matrix

Answer 2

each document is a row and each term is a column

Question 3

term document matrix

Answer 3

each term is a row and each document is a column

Question 4

methods to clean and preprocess text

Answer 4

1. case normalization
2. remove punctuation
3. remove numbers
   remove stopwords