Quang Hoang questions

Quang Hoang answers

• Mapping data to ground truth list
• Column Pair-wise reorganization in Pandas
• inserting a value into a dataframe based on a comparison condition
• How to do one-hot-encoding based on a combination of two categorical columns using pandas?
• How to sort values in a Multi-index while keeping the index structure
• Numpy: How to get the sums of integer array slices based on indexes from another array in a vectorized manner?
• Numpy select returning boolean error message
• Euclidean distance between two pandas dataframes
• Sum by groups, preserving NAs
• Count number of categories after GROUP BY in SQL or Pandas