Function

Write a function named 'getmonitor' that takes three arguments: 'id', 'directory', and 'summarize'. Given a monitor ID number, 'getmonitor' reads that monitor's particulate matter data from the directory specified in the 'directory' argument and returns a data frame containing that monitor's data. If 'summarize = TRUE', then 'getmonitor' produces a summary of the data frame with the
'summary' function and prints it to the console.