R Program - VIDYA VICHAR

Welcome to your R Program

How do you create a list in R?

list()

create.list()

new.list()

c()

None

How do you safely unwrap an optional in Swift?

let value = optional!

unwrap(optional)

guard let value = optional { ... }

if let value = optional { ... }

None

How do you create a histogram in R?

graph.hist()

hist()

create.hist()

histogram()

None

How do you write a single-line comment in Swift?

# This is a comment

// This is a comment

/* This is a comment */

None

Which function is used to merge two data frames in R?

combine()

union()

join()

merge()

None

How do you read a CSV file in R?

csv.read()

read.csv()

load.csv()

open.csv()

None

How do you create a factor variable in R?

new.factor()

factor()

factorize()

create.factor()

None

Which function is used to calculate the mean of a vector in R?

mean_value()

mean()

average()

mean_of()

None

How do you concatenate two strings in Swift?

let result = concatenate(string1, string2)

let result = string1.append(string2)

let result = string1.concat(string2)

let result = string1 + string2

None

10.

What is the function to create a data frame in R?

data.frame()

dataframe()

new.data.frame()

create.dataframe()

None

11.

How do you install a package in R?

install("package_name")

install.packages("package_name")

load.packages("package_name")

require("package_name")

None

12.

How do you create a matrix in R?

new_matrix()

matrix()

mat()

create.matrix()

None

13.

Which function is used to calculate the standard deviation in R?

sd()

standard_deviation()

std_dev()

stdev()

None

14.

How do you remove NA values from a vector in R?

na_delete()

na.omit()

na.remove()

na.exclude()

None

15.

How do you concatenate strings in R?

merge()

concat()

paste()

combine()

None

16.

How do you handle multiple errors in a single do-catch block in Swift?

catch { case error1: ... case error2: ... }

catch { if error1 { ... } else if error2 { ... } }

try-catch(error1, error2)

catch (error1, error2) { ... }

None

17.

What is the file extension for R scripts?

.rscript

.rs

None

18.

How do you find the unique values in a vector in R?

unique()

unique_items()

distinct()

unique.values()

None

19.

How do you remove a column from a data frame in R?

remove.column(dataframe, column)

dataframe$column <- NULL

drop.column(dataframe, column)

delete.column(dataframe, column)

None

20.

What does the @objc attribute in Swift indicate?

The method or property can only be used in iOS

The method or property can be accessed from Objective-C

The method or property can only be used in macOS

The method or property can only be accessed from Swift

None

21.

How do you create a plot in R?

draw()

graph()

plot()

create.plot()

None

22.

How do you save a plot as a PNG file in R?

plot.save("filename.png")

export.png("filename")

png("filename.png")

save.png("filename")

None

23.

How do you find the dimensions of a data frame in R?

shape(dataframe)

size(dataframe)

len(dataframe)

dim(dataframe)

None

24.

How do you create a sequence of numbers from 1 to 10 in R?

seq(from=1, to=10)

1:10

sequence(1, 10)

seq(1, 10)

None

25.

How do you create a tuple in Swift?

let tuple = (1, "Hello")

let tuple = [1, "Hello"]

let tuple = {"1": "Hello"}

let tuple = 1, "Hello"

None

26.

How do you calculate the correlation between two variables in R?

cor.test()

cor()

cov()

correlation()

None

27.

What is the function to calculate the sum of a vector in R?

add()

aggregate()

sum()

total()

None

28.

How do you get the first 6 rows of a data frame in R?

head()

beginning()

first()

top()

None

29.

How do you assign a value to a variable in R?

variable = value

variable := value

variable <- value

variable => value

None

30.

Which function is used to apply a function to each element of a vector in R?

sapply()

apply()

forEach()

lapply()

None

1 out of 3

Thanks for completing R Program

Full Name

Phone

Time is Up!

Share your love