a) PDF b) SVG c) JPEG d) All of the mentioned Answer: d Explanation: When the plot() ...
View QuestionPoint out the correct statement.
a) On Mac, the screen device is launched with quartz b) On Windows, the screen device is launched ...
View Questionmerge function is used for merging data frames.
a) True b) False Answer: a Explanation: To merge two data frames horizontally, use the merge function.
View QuestionWhich of the following function is used for searching text strings by means of regular expression?
a) grepd b) grepl c) gepexpr d) all of the mentioned Answer: b Explanation: grep, grepl, regexpr, gregexpr and regexec search for matches ...
View QuestionWhich of the following signs are used to indicate repetition?
a) # b) * c) – d) All of the mentioned Answer: b Explanation: * and + ...
View QuestionRegular expressions can be thought of as a combination of literals and metacharacters.
a) True b) False Answer: a Explanation: Regular expressions have rich set of metacharacters.
View QuestionWhich of the following is used for specifying character class with metacharacter?
a) [] b) {} c) /+ d) All of the mentioned Answer: a Explanation: You can ...
View QuestionPoint out the wrong statement.
a) Variables with character values should be made less descriptive b) Variables with character values should usually be ...
View QuestionWhich of the following metacharacter is used to refer to any character?
a) % b) @ c) . d) All of the mentioned Answer: c Explanation: A dot in ...
View QuestionWhich of the following function is used for fixing character vectors?
a) tolower b) toUPPER c) toLOWER d) all of the mentioned Answer: a Explanation: It translates character ...
View Question