Update plan.txt
add questions.txt
added data_preprocess.py
remove data_preprocess.py
find out most common terms
top term list
add dir
remove
added data_explore.py as the main file, calculated tf-idf
add nlp.py, contains the function to calculate tf-idf
remove data_preprocess.py
add feature_name.txt
add four feature files
add 3 data files
remove feature files
rm
Delete data_explore.py
add tf_idf data files
add sum of tf_idf file tf_idf.csv
test merge

-tracking branch 'origin/master'
test merge

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.