September 2015
Beginner
596 pages
18h 33m
English
Appendix B
Command |
What it does |
|---|---|
c(1,1,0,2.7,3.1) |
creates the vector (1,1, 0, 2.7, 3.1) |
1:100 |
creates the vector (1, 2,... , 100) |
(1:100)^3 |
creates the vector (13, 23,. .. , 1003) |
rep(0,50) |
creates the vector (0, 0,... , 0) of length 50 |
seq(0,99,3) |
creates the vector (0, 3, 6, 9,... , 99) |
v[5] |
5th entry of vector v (index starts at 1) |
v[-5] |
all but the 5th entry of v |
v[c(3,1,4)] |
3rd, 1st, 4th entries of vector v |
v[v>2] |
entries of v that exceed 2 |
which(v>2) |
indices of v such that entry exceeds 2 |
which(v==7) |
indices of v such that entry equals 7 |
min(v) |
minimum of v |
max(v) |
maximum of v |
which.max(v) |
indices where max(v) is achieved |
sum(v) |
sum of the entries in v |
cumsum(v) |
cumulative sums of the ... |