akrun questions

akrun answers

• count number of times the name of each US state is mentioned in a string column- creating 51 new columns for all the states
• keeping the original order of data after split() in R [duplicate]
• R using dcast,melt and concatenation to reshape data frame
• ifelse not looping over rows as expected
• How can I merge two dataframes together with some conditional requirements?
• R: Correcting the year of a date in R
• Calculating difference that starts over when a two-level factor alternates
• Problem with row-wise operation in base R
• concatenate specific character strings in columns
• Calculate average temperature (derived from other dataset) over start and end date in same row