Hello Everyone, Hope you are Doing well. In this article I am going to share answers of Nptel Data Science for Engineers Week 1 Assignment 2023. I am answering these questions to the best of my knowledge.  I try to provide the proofs for each problem so that it can be understandable how I approached. 

Also Read: Data Science for Engineers Week 0 Assignment  

If you are looking for 2025 NPTEL Assignment of Data Science for Engineers Week 1 Answers, then its easy, to get the solutions 👉👉 CLICK HERE

NPTEL  Data Science for Engineers Week 1 Assignment July 2023 

In this week 1, it is provided with two assignments, one is for practice which is not graded and another one is the quiz assignment. 

In week 1 the following topics are discussed. 

• Introduction to R 
• Variable and Data types in R 
• Data Frames 
• Arithmetic, logical and matrix operations in R 
• Advanced Programming in R functions
• Data visualization in R basics. 

Introduction to R 

We are having R and R studio. 

Definition:

R : R is an Open source programming language which is widely used as statistical software and data analysis tool. Generally, R comes with command line interface. 

R Studio: It is a integrated development environment of R. It is a GUI where you can see the results and generate the codes. 

Through R studio we can solve the given assignments. 

Watch the remaining videos provided by the nptel for  more understanding. 

Let go with the Assignment 

Practice Week 1 Assignment ( Ungraded ) 

Q1. R Script file has a extension ________. 

A. Rp

B. R 

C. S 

D. None of the above 

Answer: [ B ]  .R 

Q2. In the R code given below, the value of  "i"  at which the loop breaks is ____. 

 n=16 

x=seq(1,n,2)

for(i in x){

  if(i==5){

    print(i)

    break

  }

} {codeBox}

A. 3 

B. 15

C. 5

D. 25

Answer: [ C ]    5  

Q3. The output of the code given below is ____________.

x=c(1:4)

y=c(6,3)

x *y {codeBox}

A. Error! 

B. 6 12 9 12 

C. 6 6 8  8 

D. 6 6 18 12 

Answer: [ D ] 6 6 18 12

Q4. Which of the following function is can be used to list the installed packages in R ? 

A. library()

B. library []

C. library{} 

D. All the above 

Answer: [ A ] library()

The library() function in R is used to load and attach packages, but it can also be used to list the installed packages. When called without any arguments, it displays a list of all the installed packages in your R environment.

Q5. The values(s) of  "y"  at the end of the program is given below is _______

x1=matrix(10:18,3,3)

x2=matrix(11:19,3,3)

m=cbind(apply(x1,1,min),apply(x2,1,max))

print(m)

y=apply(m,1,mean)

print(y)  {codeBox}

A.  11 12 13 

B. 30 20 40 

C. 13.5 14.5 15.5 

D. 2 12 

Answer: [ C ] 13.5 14.5 15.5 

Week 1 Assignment 

Q1. Which of the following variable names are Invalid in R ?

A. 1_variable

B. Variable_1

C. _variable

D. variable@ 

Answer: [ A ], [ C ] , [ D ] 

              1_variable, _variable, variable@ 

The above listed are invalid because variable cannot be start with the numbers, special characters and symbols. 

Hence Variable_1 is valid variable. 

Q2. The function ls() in R will _____. 

A.  set a new working directory path

 

B. list all objects in our working environment

 

C. display the path to our working directory

 

D. None of the above

Answer: [ B ]  List all objects in our working environment 

Consider the Following code snippet , Based on this answer the questions 3 and 4 

ID = c(1,2,3,4)

Patient_name = c("Ram" , "Shyam" , "Nandini" , "Maya" ) 

num.patient=4

patient_list=list(num.patient, ID, Patient_name)  {codeBox}

Q3. Which of the following command is used to access the value "Shyam" ? 

A. print(patient list[3][2])

B.  print(patient list[[3]][1])

C.  print(patient list[[3]][2])

D. print(patient list[[2]][2])

Answer: [ C ]  print(patient list[[3]][2]) 

               Shyam 

Q4. The output of the given code is given below

for ( i in patient_list[1]){

      for ( j in i ) { 

             print( j ) 

      } 

 }  {codeBox}

A.  [ 1 ]  "Ram" 

      [ 1 ]  "Shyam" 

      [ 1 ]  " Nandini" 

      [ 1 ]  " Maya" 

B. [ 1 ]  4

C. [ 1 ]  1 

     [ 2 ]  2 

     [ 3 ]  3

     [ 4 ]  4 

D. Code will throw an error 

Answer: [  B ]  4 

Run the for loop command in the code box, u can observe the output. 

Q5. What is the output of the following code? 

x = 10 + 5%%3 

print(typeof(x))  {codeBox}

A. Double 

B. Integer

 C. List 

D. None of the above 

Answer: [ B ] Integer

Q6. State whether the given statement is True or False.

The library reshape2 is based around two key functions named melt and cast

 

A. True

 

B. False

Answer: [ A ]  True 

Q7. What is the output of following code ? 

A= Matrix (c(9:1), 3, 3 ) 

print(A[3, 2]) {codeBox}

A. 6 

B. 4

C. 2

D. 8

Answer: [ B ] 4 

Create the data frame using the code given below and answer questions 8 and 9.

student data = data.frame(student id=c(1:4), student name=c(‘Ram’,‘Harish’,‘Pradeep’,‘Rajesh’))

Q8. Choose the correct command to add a column named student_dept to the dataframe student_data.

A.  student datastudent dept=c(“Commerce”, “Biology”, “English”, “Tamil”)

 

B. student data[“student dept”]= c(“Commerce”,“Biology”, “English”,“Tamil”)

C. student dept= student data[c(“Commerce”,“Biology”,“English”,“Tamil”)]

 

D. None of the above

Answer: [ D ] None of the above 

Q9. Choose the correct command to access the element Tamil in the dataframe student_data

 

A. student data[[4]]

 

B. student data[[4]][3]

 

C. student data[[3]][4]

 

D. None of the above

Answer: [ D ] None of the above 

Q10. The command to check if a value is of numeric data type is _____.

 

A. typeof()

 

B. is.numeric()

 

C. as.numeric()

 

D. None of the above

Answer: [ B ]  is.numeric()

If you are looking for 2025 NPTEL Assignment of Data Science for Engineers Week 1 Answers, then its easy, to get the solutions 👉👉 CLICK HERE

Conclusion

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