user3206440 questions

• Adding new rows to a data frame with values computed from existing rows
• Pandas - read csv stored as string in memory to data frame
• dplyr - ifelse within mutate using list
• prepared statement - using parameter to specify table name
• Pandas - convert column to int and coerce NaN
• Ruby MongodB - improving speed when working with multiple collections
• SQL weighted average
• excel radar chart - change axes limit values
• percentage count by group using dplyr
• iterate through a list of data frames and mutate columns

user3206440 answers