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

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In python. Please do not copy elsewhere as it is all incorrect, and include docstring so that I can understand the information so I can apply the methods to future problems. Thanks. import the **json** module.Write a class named SatData that reads a [JSON file containing data on 2010 SAT results for New York City](https://data.cityofnewyork.us/api/views/zt9s-n5aj/rows.json?accessType=DOWNLOAD) and writes the data to a text file in CSV format. That same JSON file will be provided as a local file in Gradescope named **sat.json**. Your code does not need to access the internet.CSV is a very simple format - just commas separating columns and newlines separating rows (see note below about commas that are part of field names). You'll see an example of CSV format below. There is a csv module for Python, but you will not use it for this project.Your class should have:* an init method that reads the file and stores it in whatever data member(s) you prefer. Any data members of the SatData class…
A SNAP container called Bind is being utilised. Because of this, when you attempted the command #rndc reload, it did not work correctly. What's going on? What actions did you take to make sure rndc could successfully connect to your bind-instance?
running Bind as a SNAP container. Because of this, when you ran the command #rndc reload it didn't work.W hy? What did you have to do in order for rndc to be able to connect to your bind-instance?
How can you protect a metacharacter (such as the $ character) from shellinterpretation?a. Precede it with a /.b. Follow it with a \.c. Precede it with a $.d. It cannot be done because metacharacters are essential.e. Precede it with a \.
Why should you always enclose your `grep` search pattern in single quotes? (e.g. `grep -v '\?*' file` as opposed to `grep -v \?* file`) They are required by `grep`. Some shell metacharacters are also regular expression characters, so `grep` could get confused when interpreting the command string. Quoting them makes `grep` ignore them and pass the literal characters to `bash`. Some regular expression characters are also shell metacharacters and `bash` could get confused when interpreting the command string. Quoting them makes `bash` ignore them and pass the literal characters to `grep` They are required by `bash`.
In Python, write a code with describtion that shows how you would add new address entries into a database table, in an addressbook database that contains the fields for first name, last name, address, and phone number. The table should have no duplicates.
Answer the given question with a proper explanation and step-by-step solution. Write a method that takes in an array of Point2D objects, and then analyzes the dataset to find points that are close together. Be sure to review the Point2D API. In your method, if the distance between any pair of points is less than 10, display the distance and the (x,y)s of each point. For example, "The distance between (3,5) and (8,9) is 6.40312." The complete API for the Point2D ADT may be viewed at http://www.ime.usp.br/~pf/sedgewick-wayne/algs4/documentation/Point2D.htmlLinks to an external site.. Do not compare a point to itself! Try to write your program directly from the API - do not review the ADT's source code. (Don't worry too much about your answer compiling - focus on using an API from its documentation.) Your answer should include only the method you wrote, do not write a complete program.
Implement a program that identifies a person based on their DNA. $ python3 dna.py databases/large.csv sequences/5.txt Lavender [https://drive.google.com/drive/folders/1uEjrE0VNWG5HZYcmsMD8ZJUWgeW2whK6?usp=sharing]Download the file that you're going to use for this problem. Extract this file and you will see a directory of sample databases and a directory of sample sequences. Specification In a file called dna.py, implement a program that identifies to whom a sequence of DNA belongs. The program should require as its command-line argument that name of a CSV file containing the STR counts for a list of individuals and should require as its second command-line argument the name of a text file containing the DNA sequence to identify. If your program is executed with the incorrect number of command-line arguments, your program should print an error message of your choice. If the correct number of arguments are provided, you may assume that the first argument is indeed a filename of a…
To test the text-provided implementations of min(), max(), floor(), ceiling(), select(), rank(), deleteMin(), deleteMax(), and keys(), create a test client called TestBinarySearch.java. Initially, use the default indexing client. Add code to accept more command-line arguments if needed.
To test the text-provided implementations of min(), max(), floor(), ceiling(), select(), rank(), deleteMin(), deleteMax(), and keys(), create a test client called TestBinarySearch.java. Start by using the default indexing client. Add code to accept extra command-line arguments as needed.
"Add a new built-in path command that allows users to show the current pathname list, append one pathname, or remove one pathname. In your shell implementation, you may keep a data structure to deal with the pathname list. If you do not use execle() or execve() that allows you to execute with your own environment variables, you will need to add it to the “real” PATH environment variable for executables in the path to work correctly. The initial value of path within your shell shall be the pathname list contained in the PATH environment variable. Implement the path command as follows: • path (without arguments) displays the pathnames currently set. It should show pathnames separated by colons. For example, "/bin:/user/bin". • path + ./bin appends the pathname to the path variable. You may assume that only one pathname is added at a time. • path - ./bin removes the pathname to the path variable. You may assume that only one pathname is removed at a time. You may assume that there are no…
Write your own version of find named myfind that writes output to the file findout but without the clutter of error messages, such as those generated when you do not have permission to search a directory. The myfind command should accept the same options and arguments as find. Can you think of a situation in which myfind does not work as desired?