flights
## # A tibble: 336,776 × 19
## year month day dep_time sched_dep_time dep_delay arr_time sched_arr_time
## <int> <int> <int> <int> <int> <dbl> <int> <int>
## 1 2013 1 1 517 515 2 830 819
## 2 2013 1 1 533 529 4 850 830
## 3 2013 1 1 542 540 2 923 850
## 4 2013 1 1 544 545 -1 1004 1022
## 5 2013 1 1 554 600 -6 812 837
## 6 2013 1 1 554 558 -4 740 728
## 7 2013 1 1 555 600 -5 913 854
## 8 2013 1 1 557 600 -3 709 723
## 9 2013 1 1 557 600 -3 838 846
## 10 2013 1 1 558 600 -2 753 745
## # ℹ 336,766 more rows
## # ℹ 11 more variables: arr_delay <dbl>, carrier <chr>, flight <int>,
## # tailnum <chr>, origin <chr>, dest <chr>, air_time <dbl>, distance <dbl>,
## # hour <dbl>, minute <dbl>, time_hour <dttm>
Coding basics
R as a calculator
1000/10
## [1] 100
x<-1000/10
x
## [1] 100
assignment symbol
What’s in a name?
Calling functions
Use of TAB
seq(from= 1,to=10,by=1)
## [1] 1 2 3 4 5 6 7 8 9 10
continuation character, +
seq(from=1,to=10)
## [1] 1 2 3 4 5 6 7 8 9 10
Printing to screen
y<-seq(from=1,to=10)
y
## [1] 1 2 3 4 5 6 7 8 9 10