A library is: (In R) a. a directory where packages are stored b. a location from...
A library is: (In R)
| a. |
a directory where packages are stored |
|
| b. |
a location from which packages are downloaded |
|
| c. |
a fundamental, bundled unit of shareable data, code, documentation, and tests |
|
| d. |
anything in R that stores data |
Homework Answers
R packages are a collection of R functions, which are complied code and sample data.
They are stored under a directory called "library" in the R environment.
a. a directory where packages are stored
Add Answer to:
A library is: (In R)
a.
a directory where packages are stored
b.
a location from...
Download the file "e_cigs.csv" from eCampus. Open R and change the working directory to be the...
Download the file "e_cigs.csv" from eCampus. Open R and change the working directory to be the directory in which you have saved "e_cigs.csv". Use the following codes dta <- read.csv("e cigs.csv") dim(dta) head (dta) summary (dta) (a) How many rows does the data object dta (a "data frame" to R) have? (b) How many columns does dta have? (c) Which of the following statements is true? 团 The columns correspond to the individuals, and the rows correspond to variables. The...
That is R code. The data is at library(TSA) from R. 6.33 The data file named...
That is R code. The data is at library(TSA) from R.
6.33 The data file named deere1 contains 82 consecutive values for the amount of deviation (in 0.000025 inch units) from a specified target value that an industrial machining process at Deere & Co. produced under certain specified operating conditions (a) Display the time series plot of this series and comment on any unusual points (b) Calculate the sample ACF for this series and comment on the results (c) Now...
For this exercise, you will need to use the packages `mosaic` and `dplyr`. ```{r warning=FALSE, message=FALSE}...
For this exercise, you will need to use the packages `mosaic` and `dplyr`. ```{r warning=FALSE, message=FALSE} # install packages if necessary if (!require(mosaic)) install.packages(`mosaic`) if (!require(dplyr)) install.packages(`dplyr`) # load the package in R library(mosaic) # load the package mosaic to use its functions library(dplyr) # load the package dplyr to use data management functions ``` 1. For decades it's been suspected that schizophrenia involves anatomical abnormalities in the hippocampus, an area of the brain involved with memory. The following data...
Suppose apartments are in four locations: Location A, Location B, Location C, and Location D. Location...
Suppose apartments are in four locations: Location A, Location B, Location C, and Location D. Location A is in the city, where your job is. Location B is 10 minutes farther from your job than Location A. Location C is 10 minutes farther from your job than Location B, and Location D is 10 minutes farther than Location C. In turn, similar apartments in Location B rent for $185 less per month than apartments in Location A, apartments in Location...
Flowers are the a. dormant phase of the plant. b. location where photosynthesis happens in the...
Flowers are the a. dormant phase of the plant. b. location where photosynthesis happens in the plant. c. reproductive organs of the plant. d. neuroprocessing unit of the plant. Choose the correct answer.
Submit the following as a R document as usual. Load the library MASS. Type the following: set.see...
Code in R:
Submit the following as a R document as usual. Load the library MASS. Type the following: set.seed (548) propTraining <- 0.5 propTesting <- 0.85 nTraining <- floor (propTraining*nrow (Boston)) nTest < floor (propTesting nrow (Boston)) # find indices for training and test sets indicesTraining <-sort (sample(1:nrow (Boston),size nTraining)) indicesTestingsetdiff (1:nrow(Boston), indicesTraining) # make training and testing data frames BostonTrain<-Boston[indicesTraining,] BostonTest ← Boston(indicesTesting,] Suppose that a contractor needs to predict whet her nox, the nitrogen oxide concentration, is...
Working on a program where my task is to implement a library (as a set of...
Working on a program where my task is to implement a library (as a set of source and header files, documentation, and a Makefile) that provides a few useful functions for working with a counted string data structure. And one of the functions that needs to be written is described below but I am having a little difficulty writing it. Program needs to be written in C. void kstrcat(kstring *destp, kstring src) Concatenates str onto the end of *destp. First...
IT PYTHON QUESTION1 Consider the following Python code, where infile.txt and outfile.txt both exist in the current directory 'z' ) 。1d = open ( ' infile. txt ' , for line in o...
IT PYTHON
QUESTION1 Consider the following Python code, where infile.txt and outfile.txt both exist in the current directory 'z' ) 。1d = open ( ' infile. txt ' , for line in old: new.write (line) new.write') ne«.close () old.close) Which of the following options best describes the purpose or outcome of this code? O A copy of the file infile.txt is made (except in double line spacing) and saved as outfile.txt in the current directory. O A copy of the...
B ahorce Maca r e are 10 gerent sontware packages from which to select. How many...
B ahorce Maca r e are 10 gerent sontware packages from which to select. How many different groups of software packages can be selected? 41 3. (14 points) A special deck of cards is formed by including a color and shape on each card, with numbers of cards available as shown in the table: Triangle Square Circle Total 20 12 Green 18 Red Total 136 Blue 61 One of these cards is randomly selected What is the probability that the...
Consider the following relation R, where {A, B} is its PK. Assume that R is in...
Consider the following relation R, where {A, B} is its PK. Assume that R is in the first normal form (INF). R (A, B, C, D, E, F) Functional dependencies: FD1: BàC FD2: AàDE FD3: ABàF Why is this table not in 2NF? Specify which FDs make R violate 2NF. Normalize the data shown in this table to second normal form (2NF). Specify the primary and foreign key (if any) in each table of your 3NF relations. Normalize the data...
Download the file "e_cigs.csv" from eCampus. Open R and change the working directory to be the directory in which you have saved "e_cigs.csv". Use the following codes dta <- read.csv("e cigs.csv") dim(dta) head (dta) summary (dta) (a) How many rows does the data object dta (a "data frame" to R) have? (b) How many columns does dta have? (c) Which of the following statements is true? 团 The columns correspond to the individuals, and the rows correspond to variables. The...
That is R code. The data is at library(TSA) from R.
6.33 The data file named deere1 contains 82 consecutive values for the amount of deviation (in 0.000025 inch units) from a specified target value that an industrial machining process at Deere & Co. produced under certain specified operating conditions (a) Display the time series plot of this series and comment on any unusual points (b) Calculate the sample ACF for this series and comment on the results (c) Now...
Suppose apartments are in four locations: Location A, Location B, Location C, and Location D. Location A is in the city, where your job is. Location B is 10 minutes farther from your job than Location A. Location C is 10 minutes farther from your job than Location B, and Location D is 10 minutes farther than Location C. In turn, similar apartments in Location B rent for $185 less per month than apartments in Location A, apartments in Location...
Code in R:
Submit the following as a R document as usual. Load the library MASS. Type the following: set.seed (548) propTraining <- 0.5 propTesting <- 0.85 nTraining <- floor (propTraining*nrow (Boston)) nTest < floor (propTesting nrow (Boston)) # find indices for training and test sets indicesTraining <-sort (sample(1:nrow (Boston),size nTraining)) indicesTestingsetdiff (1:nrow(Boston), indicesTraining) # make training and testing data frames BostonTrain<-Boston[indicesTraining,] BostonTest ← Boston(indicesTesting,] Suppose that a contractor needs to predict whet her nox, the nitrogen oxide concentration, is...
IT PYTHON
QUESTION1 Consider the following Python code, where infile.txt and outfile.txt both exist in the current directory 'z' ) 。1d = open ( ' infile. txt ' , for line in old: new.write (line) new.write') ne«.close () old.close) Which of the following options best describes the purpose or outcome of this code? O A copy of the file infile.txt is made (except in double line spacing) and saved as outfile.txt in the current directory. O A copy of the...
B ahorce Maca r e are 10 gerent sontware packages from which to select. How many different groups of software packages can be selected? 41 3. (14 points) A special deck of cards is formed by including a color and shape on each card, with numbers of cards available as shown in the table: Triangle Square Circle Total 20 12 Green 18 Red Total 136 Blue 61 One of these cards is randomly selected What is the probability that the...
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