Que.Which of the following is used for reading in saved workspaces?
|
| a. unserialize |
| b. load |
| c. get |
| d. set |
Que.Point out the wrong statement?
|
| a. write.table is used for for writing tabular data to text files (i.e. CSV) or connections |
| b. writeLines is used for for writing character data line-by-line to a file or connection |
| c. dump is used for for dumping a textual representation of multiple R objects |
| d. all of the mentioned |
Que.________ is used for outputting a textual representation of an R object.
|
| a. dput |
| b. dump |
| c. dget |
| d. dset |
Que.Which of the following argument denotes if the file has a header line?
|
| a. header |
| b. sep |
| c. file |
| d. footer |
Que.Point out the correct statement?
|
| a. unserialize is used for converting an R object into a binary format for outputting to a connection |
| b. save is used for saving an arbitrary number of R objects in binary format to a file |
| c. The read.data() function is one of the most commonly used functions for reading data |
| d. save is not used for saving an arbitrary |
save is used for saving an arbitrary number of R objects in binary format to a file
Que.Which of the following statement would read file “foo.txt”?
|
| a. data <- read.table(“foo.txt”) |
| b. read.data <- read.table(“foo.txt”) |
| c. data <- read.data(“foo.txt”) |
| d. data <- data(“foo.txt”) |
data <- read.table(“foo.txt”)
Que.Which of the following function is identical to read .table?
|
| a. read.csv |
| b. read.data |
| c. read.tab |
| d. read.del |
Que.Which of the following code would read 100 rows?
|
| a. initial <- read.table(“datatable.txt”, nrows = 100) |
| b. tabAll <- read.table(“datatable.txt”, colClasses = classes) |
| c. initial <- read.table(“datatable.txt”, nrows = 99) |
| d. initial <- read.table(“datatable.txt”, nrows = 101) |
initial <- read.table(“datatable.txt”, nrows = 100)
Que.What will be the output of the following R code?> y <- data.frame(a = 1, b = "a")
> dput(y)
|
| a. structure(list(a = 1, b = list(1L, .Label = “a”, class = “factor”)), .Names= c(“a”,”b”), row.names = c(NA, -1L), class = “data.frame”) |
| b. list(list(a = 1, b = list(1L, .Label = “a”, class = “factor”)), .Names= c(“a”,”b”), row.names = c(NA, -1L), class = “data.frame”) |
| c. structure(list(a = 1, b = structure(1L, .Label = “a”, class = “factor”)), .Names= c(“a”,”b”), row.names = c(NA, -1L), class = “data.frame”) |
| d. Error |
structure(list(a = 1, b = structure(1L, .Label = “a”, class = “factor”)), .Names= c(“a”,”b”), row.names = c(NA, -1L), class = “data.frame”)
Que.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.y
|
| a. a b1 1 a |
| b. a b1 2 b |
| c. a b2 1 a |
| d. b a1 a a |