Select and Mutate

verbs01.R

hflights[c('ActualElapsedTime','ArrDelay','DepDelay')]
# Equivalently, using dplyr:
select(hflights, ActualElapsedTime, ArrDelay, DepDelay)

# Print out a tbl with the four columns of hflights related to delay
select(hflights, ActualElapsedTime, AirTime, ArrDelay, DepDelay)

# Print out hflights, nothing has changed!
hflights

# Print out the columns Origin up to Cancelled of hflights
select(hflights, Origin:Cancelled)

# Find the most concise way to select: columns Year up to and 
# including DayOfWeek, columns ArrDelay up to and including Diverted
# Answer to last question: be concise! 
# You may want to examine the order of hflight's column names before you 
# begin with names()
names(hflights)
select(hflights, -(DepTime:AirTime))