pm2r

1
Take a look at the 'iris' dataset that comes with R. The data can be loaded with the code:

library(datasets)
data(iris)

A description of the dataset can be found by running

?iris

pm2r

1
Take a look at the 'iris' dataset that comes with R. The data can be loaded with the code:

library(datasets)
data(iris)

A description of the dataset can be found by running

?iris

pm2r

1
Take a look at the 'iris' dataset that comes with R. The data can be loaded with the code:

library(datasets)
data(iris)

A description of the dataset can be found by running

?iris

pm2r

## Write a function that reads a directory full of files and reports the number of completely observed cases in each data file.
## The function should return a data frame where the first column is the name of the file and the second column is the number
## of complete cases. A prototype of this function follows
 
complete <- function(directory, id = 1:332) {
    ## 'directory' is a character vector of length 1 indicating
    ## the location of the CSV files
    ## 'id' is an integer vector indicating the monitor ID numbers
    ## to be used
    ## Return a data frame of the form:

pm2r

best <- function(state, outcome) {
  ## Read outcome data
  ## Check that state and outcome are valid
  ## Return hospital name in that state with lowest 30-day death
  ## rate
  
  source("sortHospitalsByOutcome.R")
  head(sortHospitalsByOutcome(state, outcome), 1)
}

pm2r

1
The R language is a dialect of which of the following programming languages?
S

2
The definition of free software consists of four freedoms (freedoms 0 through 3). Which of the following is NOT one of the freedoms that are part of the definition?
The freedom to prevent users from using the software for undesirable purposes.

3
In R the following are all atomic data types EXCEPT 

pm2r

/*<?php
//*/public class PhpJava { public static void main(String[] args) { System.out.printf("/*%s",
//\u000A\u002F\u002A
class PhpJava {
    static function main() {
        echo(//\u000A\u002A\u002F
        "Hello World!");
}}
//\u000A\u002F\u002A
PhpJava::main();