
522270 - Quiz1 (Class01-02)
Authored by Thitinan Pholsook
Computers
University
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10 questions
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1.
DRAG AND DROP QUESTION
45 sec • 1 pt
หากต้องการให้ได้ผลลัพธ์ดังนี้
2 5 8 11 14 17 20 23
ควรเขียน R script อย่างไร?
seq(from = (a) , to = (b) , by = (c) )
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
จาก R script ดังแสดงด้านล่าง
a <- rep(c(1, 3, 5, 7, 9), each=3)
ผลลัพธ์ a[5] ในข้อใดถูกต้องที่สุด
1
3
5
7
9
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
จาก R script ที่แสดงด้านล่าง
matA <- matrix(1:15, nrow = 3, ncol = 5)
matB <- matA*2
matC <- matB[-2,-1]
ผลลัพธ์ของ matC ในข้อใดถูกต้องที่สุด?
ผิดทุกข้อ
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
จาก R script ที่แสดงในภาพ
ผลลัพธ์ในข้อใดถูกต้องที่สุด?
[1] 1
[1] 2
[1] 4
[1] 6
[1] 8
[1] 10
[1] 1
[1] 3
[1] 5
[1] 7
[1] 9
[1] 1
[1] 2
[1] 4
[1] 8
[1] 1
[1] 4
5.
FILL IN THE BLANK QUESTION
45 sec • 1 pt
จาก R script ที่แสดงดังภาพ
ผลลัพธ์ของ z คือ
6.
DRAG AND DROP QUESTION
1 min • 1 pt
จากข้อมูล
temp <- list(c(3,7,5,6,-1), c(6,9,10,4,5), c(2,8,3,-2,3), c(1,4,-5,2,2), c(0,7,-1,4,2), c(-3,5,7,-4,4), c(3,-3,1,4,1))
หากต้องการผลลัพธ์ตามด้านล่าง
[1] -1 4 -2 -5 -1 -4 -3
ควรเขียน R script อย่างไร
(a) (temp, (b) )
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
จาก R script ด้านล่าง
cities <- c("Bangkok", "Nakhon Ratchasima", "Chiang Rai")
sum_cities <- sum(unlist(lapply(cities, nchar)))
ผลลัพธ์ของ sum_cities คือ
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