a) rename b) filter c) set d) subset Answer: b Explanation: The filter() function is used to ...
View QuestionPoint out the correct statement?
a) You can also omit variables using the select() function by using the negative sign b) The arrange() ...
View QuestionThe _________ function can be used to select columns of a data frame that you want to focus on.
a) select b) rename c) get d) set Answer: a Explanation: The select() function allows you to ...
View QuestionWhich of the following object is masked from ‘package: stats’?
a) filter b) union c) set difference d) get difference Answer: a Explanation: The following objects are ...
View QuestionThe dplyr package can be installed from CRAN using __________
a) installall.packages(“dplyr”) b) install.packages(“dplyr”) c) installed.packages(“dplyr”) d) installed.packages(“dpl”) Answer: b Explanation: After installing the package it ...
View QuestionThe dplyr package can be installed from GitHub using the _______ package.
a) dev b) devtools c) devtool d) devdel Answer: b Explanation: The GitHub repository will usually contain ...
View QuestionThe _______ operator is used to connect multiple verb actions together into a pipeline.
a) pipe b) piper c) start d) end Answer: a Explanation: It is denoted by %>% ...
View Question________ add new variables/columns or transform existing variables.
a) mutate b) add c) apped d) arrange Answer: a Explanation: arrange is used to reorder rows ...
View QuestionPoint out the wrong statement?
a) The dplyr package was developed by Hadley Wickham of RStudio b) The dplyr package is an optimized and ...
View Question_________ generate summary statistics of different variables in the data frame, possibly within strata.
a) rename b) summarize c) set d) subset Answer: b Explanation: The dplyr package as a number ...
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