JeremyS questions

JeremyS answers

• invalid factor level, NA generated when pasting in a dataframe in r
• data.table's fread() giving unwanted download message
• R overlap multiple GRanges with findOverlaps()
• Dealing with NaN when calculating means
• Import all txt files in folder, concatenate into data frame, use file names as variable in R?
• Select rows in a dataframe in r based on values in one row
• Count the number of pattern matches in a string
• Calculate between columns in data.table or dplyr?
• Same function over multiple data frames in R