R Programming Essentials Flashcards | StudBud

R Programming Essentials

50 termsStudBud Administration

Test your knowledge on key concepts and functions in R programming for data analysis and visualization

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1
What does the scale_fill_gradient() function do?
Create color gradients
Create line plots
Create bar charts
Create scatter plots
2
What does the geom_density() function create?
Density plots
Box plots
Histograms
Bar charts
3
What does ggplotly() create?
Histograms
Interactive plots
Static plots
Bar charts
4
What does the cor() function calculate?
Standard deviation
Mean values
Variance
Correlation
5
What is R's primary focus?
Mobile apps
Reproducible research
Game development
Web design
6
What does geom_bar() do?
Creates line plots
Creates bar charts
Creates scatter plots
Creates density plots
7
Which package is popular for data visualization?
dplyr
ggplot2
tidyr
caret
8
What does pivot_longer() do?
Group data
Filter data
Wide to long
Long to wide
9
What does the theme() function modify?
Data components
Data types
Non-data components
Plot colors
10
What does 'broom' do?
Cleans data
Creates plots
Converts analysis objects
Generates reports
11
What does the 'tidyverse' include?
Game development libraries
Data science packages
Web scraping tools
Machine learning tools
12
Which package is for data visualization?
tidyr
dplyr
lubridate
ggplot2
13
Which package is for machine learning?
caret
reshape2
broom
sf
14
What does scale_color_manual() customize?
Colors in plots
Data types
Plot size
Plot shapes
15
How does ggplot2 create layered visualizations?
Using loops
Using data frames
Using arrays
Using functions
16
What does filter() do in dplyr?
Select columns
Subset rows
Group data
Create new variables
17
What does 'forecast' package analyze?
Time series
Static data
Machine learning
Web scraping
18
What is 'plotly' used for?
Static graphs
Machine learning
Interactive visualizations
Data cleaning
19
What does ggsave() do?
Read data
Filter data
Save visualizations
Create plots
20
Which function creates scatter plots?
geom_histogram()
geom_point()
geom_line()
geom_bar()
21
What does the broom package do?
Create plots
Filter data
Convert analysis objects
Read data
22
What does 'rmarkdown' allow?
Web scraping
Game creation
Dynamic documents
Static reports only
23
What is R primarily used for?
Graphic design
Statistical computing
Game design
Web development
24
Which package integrates Google Maps?
dplyr
tidyr
ggplot2
ggmap
25
Which function fits linear models?
chisq.test()
t.test()
lm()
anova()
26
Which function performs t-tests?
lm()
t.test()
anova()
cor()
27
Which package is for animated visualizations?
dplyr
ggplot2
caret
gganimate
28
What is the main data structure in R?
Matrix
Data frame
List
Vector
29
What is R's ecosystem known for?
Limited resources
No community support
Rich package availability
Only for experts
30
Which package is for regression trees?
dplyr
rpart
caret
ggplot2
31
How can R connect to databases?
Using RODBC
Only with Excel
With stringr
Through ggplot2
32
What is a data frame?
A statistical model
A programming function
Tabular data structure
A type of graph
33
What is R's primary data structure?
Graphs
Functions
Data frames
Strings
34
Which package is for data manipulation?
dplyr
tidyr
broom
ggplot2
35
How does R support parallel processing?
Single-threaded only
Only with loops
Using foreach
No support
36
Which package simplifies data tidying?
reshape2
dplyr
tidyr
caret
37
What does 'ggplot2' use?
Statistical tests
Data mining
Grammar of Graphics
Linear regression
38
Which package is for text mining?
dplyr
ggplot2
tm
lubridate
39
Which function flips plot axes?
theme()
geom_point()
facet_wrap()
coord_flip()
40
How does R handle missing data?
na.include()
na.remove()
na.omit()
na.keep()
41
Which package supports spatial data?
sf
ggplot2
dplyr
caret
42
What does aes() define in ggplot2?
Plot types
Aesthetic mappings
Color schemes
Data types
43
Which package is for reshaping data?
reshape2
tidyr
dplyr
stringr
44
Which package helps with date manipulation?
lubridate
stringr
ggplot2
dplyr
45
Which function reads CSV files?
select()
read_csv()
write_csv()
filter()
46
Which function creates box-and-whisker plots?
boxplot()
geom_histogram()
geom_density()
geom_point()
47
Which package is for categorical variables?
dplyr
ggplot2
caret
forcats
48
What is R's command-line interface?
Python shell
RStudio
R console
Excel
49
Which function creates summary statistics?
select()
summarize()
filter()
mutate()
50
Which function allows multiple plots based on a factor?
scale_color_manual()
geom_point()
theme()
facet_wrap()