Command Quicklist Reference

Question 1

ls

Answer 1

LiSt objects

Question 2

rm

Answer 2

ReMove objects

Question 3

str

Answer 3

STRucture of an object

Question 4

unz

Answer 4

UNZip

Question 5

getwd

Answer 5

GET Working Directory

Question 6

dir

Answer 6

DIRectory

Question 7

sprintf

Answer 7

String PRINT Formatted

Question 8

c

Answer 8

Combine values

Question 9

regexpr

Answer 9

REGular EXPRession

Question 10

diag

Answer 10

DIAGonal values of a matrix

Question 11

col

Answer 11

COLumn

Question 12

lapply

Answer 12

List APPLY # apply function to each element and return a list

Question 13

sapply

Answer 13

Simplify APPLY apply function to each element and attempt to return a vector

Question 14

mapply

Answer 14

Multivariate APPLY

Question 15

tapply

Answer 15

Table APPLY # apply function to sets of values as defined by an index

Question 16

apply

Answer 16

APPLY function to sets of values as defined by an index. Margin = 1 or 2 in apply – rows [1] come before columns [2]