user3206440 questions

• 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
• find first of documents for each distinct values for one field
• Netezza SQL convert VARCHAR to binary string
• Chartjs - data format for bar chart with multi-level x-axes
• Mongodb replacing dot (.) in key name while inserting document
• ggplot add text inside each tile of geom tile

user3206440 answers