Python

Adding ‘how=’outer’ to ‘pd.merge()’ will actually do the job! Here’s a very good comprehensive article about Panda’s Join, Merge and Concatenate. And by the way, if you would like to fill NA values when merging, just add ‘.fillna(‘0′)’, in this case it will fill NA values with zeroes.

Results in beautiful Instead of Who’d want to format date like this… 😕

Turns out it’s quite simple if you know the right pandas methods. There’s a simple way to split categorical column into multiple columns with panda’s get_dummies. That is one separate column for each category. Yes, all done automatically. Now we have a bunch of columns with category name in the column names and 0’s and … Read more