Chris questions

• pandas dataframe to series [duplicate]
• Transpose dataframe without t(), and using spread(), cast(), or melt()
• Plotting a ggplot2 graph in a power point slide with a given size - R
• Creating a dataframe with append
• Extract Year, Month and Day from datetime64[ns, UTC], Python [duplicate]
• How to simply count number of rows with NAs - R [duplicate]
• nanfunctions and regular functions behaving the same on Pandas type
• Reindex MultiIndex with unique values in level
• R's equivalent of string.replace() in python
• R combinations with dot ("."), "~", and pipe (%>%) operator

Chris answers