wer the following: Let R be a subset of pixels in an image. We call R a region of the image if R is cònnected set. The boundary of a region R is the set of pixels in the region that have one or more neighbours that are not in R. In the following image, all pixels with value "l" constitute a region. 0 0 0 0 )o 0 0

wer the following: Let R be a subset of pixels in an image. We call R a region of the image if R is cònnected set. The boundary of a region R is the set of pixels in the region that have one or more neighbours that are not in R. In the following image, all pixels with value "l" constitute a region. 0 0 0 0 )o 0 0

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

Similar questions

(9) Suppose that we are given f : A → B and subsets X ⊂ A respectively Y ⊂ B so that we can define the direct image f(X) ⊂ B and the inverse image f^−1(Y ) ⊂ A. So that if X ⊂ A, then f(X) is a set and if Y ⊂ B, then f^−1(Y) is a set; you are proving things about these definitions. (a) Prove that f^−1(X ∪ Y ) = f^−1(X) ∪ f^−1(Y ). (b) Prove that if f is surjective then Y ⊂ f(f^−1(Y )).
Q. Given a 2d grid map of '1's (land) and '0's (water),count the number of islands.An island is surrounded by water and is formed byconnecting adjacent lands horizontally or vertically.You may assume all four edges of the grid are all surrounded by water. Example 1: 11110110101100000000Answer: 1 Example 2: 11000110000010000011Answer: 3""" def num_islands(grid): count = 0 for i in range(len(grid)): for j, col in enumerate(grid[i]): if col == 1: dfs(grid, i, j) count += 1 Please code it. .
Q1. Given a 2d grid map of '1's (land) and '0's (water),count the number of islands.An island is surrounded by water and is formed byconnecting adjacent lands horizontally or vertically.You may assume all four edges of the grid are all surrounded by water. Example 1: 11110110101100000000Answer: 1 Example 2: 11000110000010000011Answer: 3""" def num_islands(grid): count = 0 for i in range(len(grid)): for j, col in enumerate(grid[i]): if col == 1: dfs(grid, i, j) count += 1 Please code it.
Given a function f : A → B, we get a corresponding function f : P(A) → P(B), that maps a subset X ⊆ A to its image f(X) ⊆ B. What condition must f : A → B satisfy for f : P(A) →P(B) to be one-to-one? What condition must f : A → B satisfy for f : P(A) → P(B) to be onto?
I use this code but I cant get the first graph from the picture, I get second graph. Why?? Code: t=(0:0.5:20); % t is a vector which contains time values from 0 to 20s with a step size of 0.5a=sin(t); % a is a sin(t) functionx=pi/6:15:pi/2; % phase difference φ for 30,45,60,90b=sin(t+x); % b is a sin(t+x) funcion plot(t,a) % plot the sin(t) function with respect to ttitle('sin(t) versus Time') % add title to graphxlabel('time') % add x-label to the graphylabel('sin(t)') % add y-label to the graphlegend('sin(t)') % add legend to the graph figure % to plot multiple linesplot(t,a,t,b,'--') % plot the sint(t) & sin(t+x) function with respect to ttitle('Function versus Time') % add title to the graphxlabel('time') % add x-label to the graphylabel('Function') % add y-label to the graphlegend('sin(t)','sin(t+x)') % add legend to the graph % Create a figure divided into four subplotssubplot(2,2,1) % divides the current figure into an 2-by-2 grid and creates axes in the position…
Problem Alice was given a number line containing every positive integer, x, where 1<=x<=n. She was also given m line segments, each having a left endpoint, l (1<=l<=n), a right endpoint, r (1<=r<=n), and an integer weight, w. Her task is to cover all numbers on the given number line using a subset of the line segments, such that the maximum weight among all the line segments in the chosen subset is minimal. In other words, let S=(l1,r1,w1),(l2,r2,w2),....,(lk,rk,wk), represent a set of k line segments chosen by Alice, max(w1,w2,...,wk) should be minimized. All numbers 1,2,....n should be covered by at least one of k the chosen line segments. It is okay for the chosen line segments to overlap. You program should output the minimized maximum weight in the chosen subset that covers all the numbers on the number line, or -1 if it is not possible to cover the number line. Input format The first line of the input contains an integer, n - denoting the range of numbers…
Consider eight points on the Cartesian two-dimensional xx-yy plane. For each pair of vertices uu and vv, the weight of edge uvuv is the Euclidean (Pythagorean) distance between those two points. For example, dist(a,h) = \sqrt{4^2 + 1^2} = \sqrt{17}dist(a,h)=42+12=17 and dist(a,b) = \sqrt{2^2 + 0^2} = 2dist(a,b)=22+02=2. Using the algorithm of your choice, determine one possible minimum-weight spanning tree and compute its total distance, rounding your answer to one decimal place. Clearly show your steps.
LetA = {p, q, r, s}B = {r, t, v}C = {p, s, t, u}be subsets of S = {p, q, r, s, t, u, v, w}. Find:a. B ∩ Cb. A ∪ Cc. C′d. A × Be. (A ∪ B) ∩ C′
Given the following set of vertices V and set of edges E. V = {p, q, r, s, t, u} E = {(p,q), (q,r), (r, s), (t,p), (q,t), (r, t), (t,u)} Which of the following is correct? Select one: A.There are 7 vertices B.There are 7 edges. C.The degree at vertex p is 7 D.The total degree of all vertices is 7
Imagine a robot sitting on the upper left corner of grid with r rows and c columns.The robot can only move in two directions, right and down, but certain cells are "off limits" such thatthe robot cannot step on them. Design an algorithm to find a path for the robot from the top left tothe bottom right.
Given the sets A = { A, B, C, D} and B = {C, D, E}, what is A v B A-B
Q. Let A = {a, b, c, d, e} and B = {1, 2, 3, 4, 5, 6, 7, 8}. How many functions f : A → B(a) ... are injective?(b) ... are not injective?(c) ... are such that f(a) = f(b) = f(c)?(d) ... are such that exactly three elements of A have 8 as an image?(e) ... are surjective?