Columns can be arranged in descending order too by using the special . . . . . . . . operator.
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R Programming · all questionsData Structures in R Programming
Data Structures in R Programming
practice.
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Point out the wrong statement?
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Which of the following is used for reading tabular data?
> y <- data.frame(a = 1, b = "a")
> dput(y, file = "y.R")
> new.y <- dget("y.R")
> new.ySelect an option to see the answer and solution.
. . . . . . . . is used for outputting a textual representation of an R object.
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Which of the following function is identical to read .table?
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Point out the correct statement?
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What will be the output of the following R code?
> x <- Sys.time()
> class(x)Select an option to see the answer and solution.
. . . . . . . . function is similar to the existing subset() function in R but is quite a bit faster.
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Which of the following is used for reading in saved workspaces?
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What will be the output of the following R code?
> x <- 1:4
> x > 2Select an option to see the answer and solution.
Which of the following function is similar to summarize?
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The . . . . . . . . operator is used to connect multiple verb actions together into a pipeline.
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What will be the output of the following R code?
> x <- as.Date("1970-01-01")
> xSelect an option to see the answer and solution.
. . . . . . . . add new variables/columns or transform existing variables.
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Connections to text files can be created with the . . . . . . . . function.
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.rda extension used when saving data with function . . . . . . . .
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What will be the output of the following R code?
> x <- matrix(1:4, 2, 2)
> y <- matrix(rep(10, 4), 2, 2)
> x * ySelect an option to see the answer and solution.
Which of the following R code creates a connection to 'foo.txt'?
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The dplyr package can be installed from GitHub using the . . . . . . . . package.
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Point out the wrong statement?
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