Random Questions & Answers on R || Article

Hello Friends, Welcome to the third article of series named Random Questions & Answers on R. The main motto of this series of articles is to provide Questions and their Answers related to R-software that you must know if you are a student of Statistics and want to work or already working on R. These articles will also help you if you are preparing for any corporate sector interview where R is mandatory. So, without wasting the time, Just dive into this article and learn the following 10 Qusetions from here 😊

Q.1. Is R code : x = c(2, 3 5, 4)/2; is error free ?

Ans : No

Q.2. How to create a scatter diagram in R using base package ?

Ans : A scatter diagram is created in R by using plot ( ) function.

Q.3. How to install a new package in R ?

Ans : A new package is installed in R by using command install.packages("package_name")

Q.4. What will be the output of R code : x = c(2, 3, 5)*2 ; print(x);

Ans : 4 6 10

Q.5. What will be the output of R code : x = c(2, 3, 5, 4)*c(3, 2) ; print(x);

Ans : 6 6 15 8

Q.6. What is the purpose of using lubridate package in R ?

Ans : lubridate is used to work more with dates and times in R.

Q.7. How to calculate natural logarithm of a number in R ?

Ans : Natural logarithm of a number is calculated in R by using log ( ) function.

Q.8. How to calculate sum of numeric vector x = c(2, 5, 1, 6, 7, NA) in R?

Ans : Sum of a numeric vector in presence of missing values is calculated in R by using sum ( ) function and also pass one more argument na.rm and set its value as TRUE .

Q.9. What will be the output of following R code : x = c(1, 2, NA, 3, 8, 2, 4, 7) ; sum(x)

Ans : NA

Q.10. How to create a histogram in R using base package?

Ans : A histogram is created in R by using hist ( ) function.

So, That's all about 10 questions on R in this article. In next article we'll learn 10 more questions on R-Software. Till then, Good Bye !

Happy Learning ! 😊

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