1.) If I have a data.frame df <- data.frame(a = c(1, 2, 3), b = c(4, 5, 6), c(7, 8, 9))
...
1a.) How do I select the c(4, 5, 6)
?
1b.) How do I select the 1
?
1c.) How do I select the 5
?
1d.) What is df[, 3]
?
1.) If I have a data.frame df <- data.frame(a = c(1, 2, 3), b = c(4, 5, 6), c(7, 8, 9))
...
1a.) How do I select the c(4, 5, 6)
?
1b.) How do I select the 1
?
1c.) How do I select the 5
?
1d.) What is df[, 3]
?