gibbz00 questions

• Apply function with multiple arguments to pandas groupby object
• Getting rid of wash out rows in R dataframe by group
• Extracting event types from last 21 day window
• Ignoring multiple NaNs when calculating standard deviation
• Efficient way to perform running total in the last 365 day window
• Tracking full Level change row by row
• Fetching a score associated with a date 'Around' 7 days ago
• Double Sapply nested function
• Calculating time spent in a given level when that level changes
• Rank most recent scores of students within a given date - 30 days window

gibbz00 answers