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//Preview my data
head(df) #Return the top of df is the data set
head(df, 30) #returns the first 30 rows
tail(df) #returns the bottom of the df.
head(tail(df, 30)) #Get the top of the bottom 30
DZone's 170th Refcard is an essential reference to Camel, an open-source, lightweight, integration library. This Refcard is authored by...