a) gsub is used for fixing character vectors b) sub is used for finding values like grep c) ...
View QuestionWhich of the following function is good for the automatic splitting of names?
a) split b) strsplit c) autsplit d) none of the mentioned Answer: b Explanation: strsplit split ...
View Questionmutate function is used for casting as multi dimensional arrays.
a) True b) False Answer: b Explanation: mutate is used for adding new variables.
View QuestionWhich of the following join is by default used in plyr package?
a) left b) right c) full d) all of the mentioned Answer: a Explanation: Join is faster ...
View QuestionWhich of the following function is used for casting data frames?
a) dcast b) ucast c) rcast d) all of the mentioned Answer: a Explanation: Use acast or ...
View QuestionEach observation forms a column in tidy data.
a) True b) False Answer: b Explanation: Each variable forms a column in tidy data.
View QuestionWhich of the following transforms can be performed with data value?
a) log2 b) cos c) log10 d) all of the mentioned Answer: d Explanation: Many common transforms ...
View QuestionPoint out the wrong statement.
a) Common variables are used to create missingness vector b) Common variables are used to cutting up quantitative ...
View QuestionWhich of the following function is used for determining missing values?
a) any b) all c) is d) all of the mentioned Answer: d Explanation: In R, missing ...
View QuestionWhich of the following function is used for quantiles of quantitative values?
a) quantile b) quantity c) quantiles d) all of the mentioned Answer: a Explanation: In probability and ...
View Question