2. You have a vector representing levels of exercise undertaken by 5 subjectse"I", “n", “n", "i", “I" ; n=none, I=light, i=intenseeWhich of the following is the best way to represent this in R?-a) exercise <- c("T", "n", "n", "T", "I")eb) exercise <- factor(c("I", "n", "n", "T", "T"), ordered = TRUE)-c) exercise < -factor(c("T", "n", "n", "T", "T"), levels = c("n", “T", "T'), ordered = FALSE)-d) exercise <- factor(c("I", "n", "n", "I", "T"), levels = c("n", T, "T), ordered = TRUE)

Answered: 2. You have a vector representing…

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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MATLAB: Create a vector named n which starts at -10 and steps by 1 to end at +10 by using the start:step:stop syntax. Next, generate a vector x1 so that x1 satisfies the mathematical relationship ?ଵ[?]=(0.60). Since n is a vector, one will need to utilize 0.60.^n (i.e., .^ is used in place of ^) to define x1. Redo the work just completed, but for a vector x2 where x2 satisfies the mathematical relationship ?ଶ[?]=(0.85). Repeat the work just completed, but for a vector x3 where x3 satisfies the mathematical relationship ?ଷ[?]=(1.10). In one figure window, plot x1 as a function of n using the stem command. The stem plot must show BLACK (versus the default blue) lines that have filled circles and a line width of 2; refer to the lecture example script file. Further, the horizontal axis label (xlabel) must be n, the title (title) must include your name and the vertical axis label (ylabel) must show ?ଵ[?]=(0.60)(note the subscript and superscript). In addition, turn on the grid (doc grid),…
Q5) You are given feature vectors x1 from class I and feature vectors x2 from class 2. The training set consists of the following points: Class 1 points: ((13,11), (9,9), (7,7), (15,3)} Class 2 points: ((15,9), (15,7), (13,5), (14,4)} Classify sample (15,4) using the k-nearest neighbor classifier, when K-1,3 and 5. Using any distance measurement.
Given a budget (type long) and a list of prices represented as entries of a container of type vector<long>, find out how many items on the price_list you can afford at most. This is the return value of the function. Here is its prototype: int get_most_items(std::vector<long>price_list, long budget) To solve this homework, it is a good idea to first sort the price_list in ascending order. For sorting in ascending order, you can use the function std::sort(). It can be called as std::sort(v.begin(), v.end()) .Note that there may be items on the price list whose prices are negative to make the problem a bit more interesting. If the size of price_list is zero, the function returns 0. All necessary libraries have been included. All numbers are expressed in Cents to avoid rounding errors. Here is a simple example:std::vector<long> price_list = { 10, 199, 1}; long budget = 11; int no_items = get_most_items(price_list, budget);The variable no_items will then have the…
C++.Write a function, named SecondNegative, that takes a const reference to a vector of doubles, it should return an const_iterator to the element in the vector that is the second value that is negative. If no such element exists, have the iterator point to one past the end.
Create a function set(v, i, j) that makes vector v contain the integers i through j. The original contents of v is deleted. The vector is left empty ifj < i. The argument v is a vector of integers.
42
7.Code for----- an array of meeting time intervals consisting ofstart and end times [[s1,e1],[s2,e2],...] (si < ei),determine if a person could attend all meetings. For example,Given [[0, 30],[5, 10],[15, 20]],return false.""".

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