Take a look at the 'iris' dataset that comes with R. The data can be loaded with the code: 1 library(datasets) 2 data(iris) A description of the dataset can be found by running 1 ?iris There will be an object called 'iris' in your workspace. In this dataset, what is the mean of 'Sepal.Length' for the species virginica? Please round your answer to the nearest whole number. (Only enter the numeric result and nothing else.) Enter answer here

Take a look at the 'iris' dataset that comes with R. The data can be loaded with the code: 1 library(datasets) 2 data(iris) A description of the dataset can be found by running 1 ?iris There will be an object called 'iris' in your workspace. In this dataset, what is the mean of 'Sepal.Length' for the species virginica? Please round your answer to the nearest whole number. (Only enter the numeric result and nothing else.) Enter answer here

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Q: Create an array of objects of the Person class, of size 4. Create three objects of the Person class,…

A: Algorithm steps to solve the above problem: Start Create an array of Person objects called people.…

Q: Take a close look at the C++ code in IntCollection.zip (Copy and Paste link to the external site…

A: CODE: IntCollection.cpp: // IntCollection class implementation #include "IntCollection.h" #include…

Q: Open your text editor and create a new document named model.php model.php will connect to a database…

A: <?php $request = $_REQUEST; $email = $request['id']; $first_name = $request['name']; $last_name…

Q: Java OOP Write a complete address book maintenance application. The user of the program has four…

A: 1. Import necessary libraries (e.g., Scanner, ArrayList).2. Define a Person class with attributes…

Q: Give Description of CreateConsoleScreenBuffer function.

A: CreateConsoleScreenBuffer function A screen buffer is a two-dimensional array of character and…

Q: Question 5: Add a method called save to your Person class. This method will write the object out to…

A: Introduction: You are required to create a save() method in Person class that will save the Person…

Q: 4. In this question your task is to design the following GUI. In this GUI, you are required to enter…

Q: Directions: 1. Show the ArrayStackADT interface 2. Create the ArrayStackDataStrucClass with the…

A: Given: Directions: 1. Show the ArrayStackADT interface 2. Create the…

Q: In Python, write a code with describtion that shows how you would add new address entries into a…

A: Note- since you have not provided information about your database we assume one of common use…

Q: FilelO 04: Echo to ArrayList Write a FileIo04 class with a method named readFileToArrayList() that…

A: As per our guidelines we are supposed to answer only one question. Kindly repost other questions as…

Q: Java Programming: Below is the lexer, shank and token files along with the shank.txt file. The shank…

A: Here is the corrected code for Lexer.java:

Q: In Java programming Write the code to print out a customer report. Your code must read each…

A: Use the customer object name from Customer customer = new Customer ( “ customer name” ); the…

Q: how to correct this exercise. COP2002: Programming Logic & Design with Python Project 4…

A: According to the information given:- we have to create wish list in which we taken item name and it…

Q: 8. Weighted 4*4 16 tails model) The weighted nine tails problem in the text uses a 3*3 matrix.…

A: Start. Import the Serializable and Random classes from the Java standard library. Create a class…

Q: You will be writing a scheduling application allowing a convention center to schedule events. This…

A: Here I written Python Code as per your problem. I hope you like it.

Q: Hours and minutes: The time is 03:00 Hours and minutes: The time is 03:15 fail Test 2 Input: 3 65…

A: Brief Introduction: We have to write a code in Python that will make sure that the gcd of numbers…

Q: Download the text file names.txt attached below. It contains a list of 65 female first name pper…

A: I have code below:

Q: When we no longer need a module, we can get rid of it with this cmdlet: Group of answer choices…

A: Answer in step2

Q: Create series from the following two dictionaries: {'A': 'a', 'B': 'b', 'c': 'c', 'D': 'd', 'E':…

A: import pandas as pdimport numpy as np dict1 = {'A': 'a', 'B': 'b', 'C': 'c', 'D': 'd', 'E':…

Question

Take a look at the 'iris' dataset that comes with R. The data can be loaded with the code:
1 library(datasets)
2 data(iris)
A description of the dataset can be found by running
1 ?iris
There will be an object called 'iris' in your workspace. In this dataset, what is the mean of 'Sepal.Length' for the species
virginica? Please round your answer to the nearest whole number.
(Only enter the numeric result and nothing else.)
Enter answer here

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

pizzaStats Assignment Description For this assignment, name your R file pizzaStats.R For all questions you should load tidyverse and lm.beta. You should not need to use any other libraries. Load tidyverse with suppressPackageStartupMessages(library(tidyverse)) Load lm.beta withsuppressPackageStartupMessages(library(lm.beta)) Run a regression predicting whether or not wine was ordered from temperature, bill, and pizza. Assign the coefficients of the summary of the model to Q1. The output should look something like this: Estimate Std. Error z value Pr(>|z|)(Intercept) -1.09 1.03 -1.06 0.29temperature -0.04 0.01 -3.20 0.00bill 0.03 0.01 3.75 0.00pizzas 0.19 0.06 3.27 0.00 Here is the link of the pizza.csv https://drive.google.com/file/d/1_m2TjPCkPpMo7Z2Vkp32NiuZrXBxeRn6/view?usp=sharing
In this project you will implement a student database using JavaFX. A GUI should be used as the program's interface. This program must consist of two classes. (1) The first class should define the GUI and handle the database interactions: a. Combo box should allow the user to select one of the four database actions (Insert, Delete, Find, and Update). b. The database should be implemented as a HashMap, with the ID field as the key and a student record consisting of a name and major as the value. c. The operation should be performed when the user clicks the Process Request button. d. If the user attempts to insert a key that is already in the database an error message should be displayed using a JOptionPane message dialog box. e. If the user attempts to delete, find or update a record that is not in the database, a message should also be displayed. f. After each successful operation is completed a JOptionPane window should be…
Using Java: 1 Description of the Program In this assignment, you are asked to implement a graphical application that displays a list of courses. Briefly, this GUI will take the inputs (i.e., course information), store them in an array list, and display course information in the output area. Figure 1 shows the layout of the CourseDisplay GUI. Figure 1: A screenshot of the CourseDisplay GUI. 2 Details of the program You should have three Java files: 1. CourseDisplayFrame class that extends JFrame class (The main part of your program). 2. CourseDisplayViewer class, which contains the main method where a CourseDisplay object will be created, and the GUI will pop up (Suggested frame width of 450, and frame height of 400). 3. Course class, which is the class that models the Course objects (This file will be given to you). 1 In your CourseDisplayFrame class file, you should have the followings: • Input area: – A text label and a text field (suggested width of 30) for course code; – A text…
Rules: Corner cases. By convention, the row and column indices are integers between 0 and n − 1, where (0, 0) is the upper-left site. Throw an IllegalArgumentException if any argument to open(), isOpen(), or isFull() is outside its prescribed range. Throw an IllegalArgumentException in the constructor if n ≤ 0. Unit testing. Your main() method must call each public constructor and method directly and help verify that they work as prescribed (e.g., by printing results to standard output). Performance requirements. The constructor must take Θ(n^2) time; all instance methods must take Θ(1)Θ(1) time plus Θ(1)Θ(1) calls to union() and find().
java program For this question, the server contains the id, name and cgpa of some Students in a file. The client will request the server for specific data, which the server will provide to the client. Server: The server contains the data of some Students. For each student, the server contains id, name and cgpa data in a file. Here's an example of the file: data.txt101 Saif 3.52201 Hasan 3.81.... Create a similar file in you server side. The file should have at least 8 students. The client will request the server to provide the details (id, name, cgpa) of the Nth highest cgpa student in the file. If N's value is 1, the server will return the details of the student with the highest cgpa. if N's value is 3, the server will return the details of the student with the third highest cgpa. If N's value is incorrect, the server returns to the client: "Invalid request". Client: The client sends the server the value of N, which is an integer number. The client takes input the value of N…
Python S3 Get File In the Python file, write a program to get all the files from a public S3 bucket named coderbytechallengesandbox. In there there might be multiple files, but your program should find the file with the prefix and cb - then output the full name of the file. You should use the boto3 module to solve this challenge. You do not need any access keys to access the bucket because it is public. This post might help you with how to access the bucket. Example Output ob name.txt Browse Resources Search for any help or documentation you might need for this problem. For exampler array indexing, Ruby hash tables, etc.
Load the airline JSON file into a python dictionary, save it to a text file and print the airlines that operated in Boston and SanFrancisco airports during the month of June.
1) Take the supplied cars_db.sql and create your Cars database (you will have to create the Cars database first, then execute the .sql file from within Netbeans). 2) Implement a program that has the same general user interface as the SimpleSchoolData presented in class. 3) Implement two classes, CarsDisplay which displays the above application, and implement a class named CarQueries that contains the prepared statements to execute the queries. (Java) This is the cars_db.sql DROP TABLE Cars; CREATE TABLE Cars ( CarID INT NOT NULL GENERATED ALWAYS AS IDENTITY, CarMake VARCHAR (10) NOT NULL, CarModel VARCHAR (15) NOT NULL, CarYear VARCHAR (4) NOT NULL, CarMileage DECIMAL (6) NOT NULL ); INSERT INTO Cars (CarMake,CarModel,CarYear,CarMileage) VALUES ('Honda','Civic','1998',135647), ('Honda','Accord','2009',46877), ('Nissan','Pickup','1997',235444);
createDatabaseOfProfiles(String filename) This method creates and populates the database array with the profiles from the input file (profile.txt) filename parameter. Each profile includes a persons' name and two DNA sequences. 1. Reads the number of profiles from the input file AND create the database array to hold that number profiles. 2. Reads the profiles from the input file. 3. For each person in the file 1. creates a Profile object with the information from file (see input file format below). 2. insert the newly created profile into the next position in the database array (instance variable).
python: def pokehelp(poke_name, stat_min): """ Question 4 - API You are looking for a Pokemon that can help you with your programming homework. Since Porygon is made of code, you decide to look into the species. Using the given API, return a dictionary that returns the name of each of Porygon's stats with a base stat GREATER THAN the given number, mapped to their value. Do not hardcode Porygon's stats into the results! It is not the only test case. Base URL: https://pokeapi.co/ Endpoint: api/v2/pokemon/{poke_name} Args: Pokemon name (str), stat minimum (int) Returns: Dictonary of stats >>> pokehelp("porygon", 65) {'defense': 70, 'special-attack': 85, 'special-defense': 75} >>> pokehelp("koraidon", 100) {'attack': 135, 'defense': 115, 'speed': 135} """ # pprint(pokehelp("porygon", 65)) # pprint(pokehelp("koraidon", 100))
Scenario: You have been tasked with building a URL file validator for a web crawler. A web crawler is an application that fetches a web page, extracts the URLs present in that page, and then recursively fetches new pages using the extracted URLs. The end goal of a web crawler is to collect text data, images, or other resources present in order to validate resource URLs or hyperlinks on a page. URL validators can be useful to validate if the extracted URL is a valid resource to fetch. In this scenario, you will build a URL validator that checks for supported protocols and file types.
Design a Client class that interfaces with your SQLDatabase Server (from the class Server). The Client sends a SQLQuery to the SQLDatabase and receives a Dataframe from the SQLDatabase. Your class should contain the default __dunders__ and potentially introduce some custom __dunders__. classServer.py (Just change if this file has something doesn't run or doesn't fit with new code) import sqlite3import pandas as pdclass Server:def __init__(self, db_name):self.db = sqlite3.connect(db_name)self.cursor = self.db.cursor()def __enter__(self):return selfdef __exit__(self, exc_type, exc_val, exc_tb):self.db.close()def create_table(self, table_schema):self.cursor.execute(table_schema)self.db.commit()def insert_data(self, table_name, data):for i in range(len(data)):keys = ", ".join(data.columns)values = ", ".join([f"'{value}'" if pd.isna(value) else str(value) for value in data.iloc[i]])self.cursor.execute(f"INSERT INTO {table_name} ({keys}) VALUES ({values})")self.db.commit()def…