Homework1 Importing data from statistical package and from database management system.

library(readxl)
My_data <- read_excel("My_data.xlsx")
View(My_data)

Homework2 Frame matrix and array

vector: The foundational R data structure

Numeric

X <- c(0.5, 0.6)

Logical

X <- c(TRUE, FALSE)

x <- c(T, F)

Character

X <- c("a", "b", "c")

Integer

X <- (9:29)

Complex

X <- c(1+0i, 2+4i)

Matrix and operation within matrices

X <- matrix(1:6, nrow = 2, ncol = 3)
X
##      [,1] [,2] [,3]
## [1,]    1    3    5
## [2,]    2    4    6
Y <- matrix(1:6, nrow = 3, ncol = 2)
Y
##      [,1] [,2]
## [1,]    1    4
## [2,]    2    5
## [3,]    3    6

List

X <- list(1, "a", TRUE, 1+4i)
x
## [1]  TRUE FALSE

Factor

X <- factor(c("yes", "yes", "no", "yes", "no"))