
PTDL - BUỔI 01
Authored by Bảy Nguyễn Văn
Computers
University
Used 10+ times

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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biến số x được tạo với lệnh nào sau đây?
5 <- x
x <- 5
x = "abc"
x <- "abc"
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lệnh nào dùng để xem nội dung của biến số x?
?x
x
print("x")
x <- "x"
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lệnh nào dùng để cài đặt gói ggplot2?
install.packages("ggplot2")
library("ggplot2")
require("ggplot2")
install("ggplot2")
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lệnh nào dùng để xem tài liệu trợ giúp cho hàm summary?
?summary
summary
summary()
summary <- function(x) summary(x)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phép toán nào sau đây đúng?
1 + "a"
TRUE * 2
"abc" / 3
TRUE & "a"
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lệnh nào dùng để xem danh sách tất cả các thư viện đã được cài đặt trong R?
ls()
library()
installed.packages()
packages()
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lệnh nào không dùng để tạo vector gồm các số từ 1 đến 10?
c(1:10)
seq(1, 10)
1:10
rep(1, 10)
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