R Beginner Quiz 3
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Quiz 3
1. What function is used to create a matrix?
array()
table()
matrix()
2. Which function combines data frames by rows?
rbind()
cbind()
merge()
3. Which function provides a summary of a data frame?
info()
summary()
overview()
4. What is the purpose of the 'na.rm = TRUE' argument?
Replace NAs with 0
Error on NAs
Remove NAs before calculation
5. Which function creates a logical sequence?
rep()
seq()
range()
6. How to find the square root of 16?
sqrt(16)
sqrt(16)
root(16)
7. Which symbol represents the logical 'AND'?
|
!
&
8. What is a list in R?
Heterogeneous collection
Homogeneous collection
Numeric vector
9. Which function returns the max value in a vector?
maximum()
max()
top()
10. What function clears the R environment?
delete()
clear()
rm(list = ls())
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