broccoli questions

• R multiply matrices: but with a special function
• ggplot2 dotted lines for a subsection of a plot
• Python regular expression, matching the last word
• R data.table subsetting within a group and splitting a data table into two
• Memory error while using write.csv
• Output of quantile to a data frame
• R ggplot2 fonts issue
• R generating a sparse matrix
• R data.table replace NA with mean for numeric columns and most frequent value for nominal values
• R data.table finding the mode for a group of data

broccoli answers