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0
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1
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By default R stores strings in data frames as:
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
answer
What is SQL equivalent of "i" in a typical data table query
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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Data table is mainly used for aggregation
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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What is the average mileage(mpg) of 6 cylinder, manual transmission cars in the R built-in dataset "mtcars"
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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What is the average horsepower of 4 gear, automatic transmission cars in the R built-in dataset "mtcars"
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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Which of the following is not correct
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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How to find structure of a dataframe
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
answer
onformchange How do you embed a video player using
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
answer
onformchangeWhat are the new form elements introduced in HTML5
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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Which of the following attribute triggers events when a form changes
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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Which of the following tags represents a section of document used for navigation?
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
0
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1
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Which of the following tags are no longer valid in HTML5
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
+1
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2
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Which Semantic element is best suitable for content like blog post that is self contained, independent and can be republished
asked
Jun 6, 2019
in
Data Handling using R
#datahandling
+1
vote
1
answer
If x and y are two tbls, which of the following joins return all rows from x and y irrespective of matching values?
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
dplyr never prints row names since no dplyr method is guaranteed to preserve them.
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+2
votes
1
answer
In the mtcars dataset, how many cars provide a mileage of less than 20 mpg?
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
In the iris dataset, how many flowers havePetal.Length/Petal.Width ratio of less than 10
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
In the iris dataset, how many flowers of species setosa havePetal.Length/Petal.Width ratio of less than 10.
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
What is the average mileage of a car in the mtcars dataset
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
In the hflights dataset, how many flights were cancelled in the month of January 2011
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
Which of the following functions lists all columns in a dataset with few values from each column?
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
Which of the following functions does not list the total number of observations in a dataset?
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
Which of the following functions can be used to find the number or rows and columns in a dataset?
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
dplyr is useful for:
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
0
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1
answer
tbl is an extension of:
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+2
votes
1
answer
Which command can be used to import text files in R
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
nrows and skip arguments in the read.table() command can be used to get
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
+1
vote
1
answer
The function write.csv() exports data into a file. However, this function by default adds rownames to the file. Which argument can be used to turn off addition of rownames?
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
0
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1
answer
Which package is used to import data from a SQL server to R?
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
0
votes
1
answer
The function read.csv() imports data into
asked
May 27, 2019
in
Data Handling
#datahandling
DataHandling-questions-answers
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