Homework Answers
Q. What does following Code Compute ?
Ans. Here we have A is a m×n matrix ,and x(1),x(2), .....,x(n) are n values or weights or scalars , here this code generate a column matrix b of order m×1 which is sum of the product of the j'th column of matrix A and j'th weight that is x(j) where summation varies from j = 1 to j = n .
Q. What Operation third Line is performing.
Ans. Third line is updating matrix b , in each step for a particular value of j it is adding product of j'th column of matrix A and j'th weight that is A(:,j)*x(j) to the matrix b .
Add Answer to:
2. What does the following code compute? Explain what operation the third line is per- forming....
Using MATLAB please. A = rand(m,n) x = rand(n,1) b = A * x 1. What...
Using MATLAB please.
A = rand(m,n)
x = rand(n,1)
b = A * x
1. What does the following code compute? Explain what operation the third line is per- forming b = zeros(m, 1); for i = 1:m b(i) = A(i,:) * x; end Make a copy of the relevant MATLAB function you wrote earlier, and use this code in place of the two loops you wrote. Time both codes on a sufficiently large problem. Which performs faster?
Verify that the operation count is 5n for n unknowns for this algorithm. Explain which lines...
Verify that the operation count is 5n for n unknowns for this algorithm. Explain which lines correspond to what operation count. function x = tridisolve(a,b,c,d) x = d; n = length(x); % forward elimination for j = 1:n-1 mu = a(j)/b(j); b(j+1) = b(j+1) - mu*c(j); x(j+1) = x(j+1) - mu*x(j); end % back solve x(n) = x(n)/b(n); for j = n-1:-1:1 x(j) = (x(j)-c(j)*x(j+1))/b(j); end end
Explain each line of code. What does the routine do. model small .stack 100h .code main...
Explain each line of code. What does the routine do. model small .stack 100h .code main proc mov BL, 36 yor BL, 40h mov CL, 16h m: mov ah,6 mov dl, bl. add DL, CL int 21h dec CL jnz m mov ax,4C00h int 21h main endp end main Good luck!
Question 2 (a) Provide a single line of C++ code that will declare a variable that...
Question 2 (a) Provide a single line of C++ code that will declare a variable that points to a string value, the variable is named x. [2 marks] (b) You have array c declared as string *c [5]; Give the single line of C+ + code that will assign the string pointer stored in variable x (from above) to the third element of the array c. [2 marks] (c) Write a for loop that initialises the contents of each element...
In the MATLAB code below what does the line: A(i) = 0; do? Is A(i) just...
In the MATLAB code below what does the line:
A(i) = 0;
do?
Is A(i) just a variable or does in index something?
P=1000; r=0.01; n=1; f for loop to calculate monthly interest and yearly interest for i=1:10 A(i)=0; for j=1:12 Am=P* (1+r)^n; P=Am; end A(i) = Am; end % display the amount compounded annually for 10 years i=1:10; table=[i', A']; disp('year Amount') fprintf('%2d %6.2f \n', table')
The code provided solves the boundary value problem 2 dr2 cos(a), J(1) , y(5)2.on the interval To...
Please provide code and final answer.
The code provided solves the boundary value problem 2 dr2 cos(a), J(1) , y(5)2.on the interval Toxksusing a Centred approximation of the derivative term and N= 100 nodes 1 we% Matlab code for the solution of Module 2 3 xright=5; 4 N 100; 5 x-linspace(xleft,xright,N); x x'; %this just turns x into a column vector dx- 7 (xright-xleft)/(N-1); %If theres N nodes, theres N-1 separations . 9 yright 2; 10 here is the matrix...
Explain the following code, line by line. As well as the is going on over all....
Explain the following code, line by line. As well as the is going on over all. #include <stdio.h> int main() { int a[30]; int i,j,lasti; int num; lasti=0; // scanf the number scanf("%d",&a[0]); while (1) { // sacnf the new number printf("Enter another Number \n"); scanf("%d",&num); for(i=0;i<=lasti;i=i+1) { printf("%d \n",a[i]); // we check if the num that we eneterd is greter than i if(a[i] > num) { for(j=lasti; j>= i;j--) { a[j+1]=a[j]; } a[i]=num; lasti++; break; } }...
Using C++ please explain What is the Big-O time complexity of the following code: for (int...
Using C++ please explain
What is the Big-O time complexity of the following code: for (int i=0; i<N; i+=2) { ... constant time operations... Select one: o a. O(n^2) O b. O(log n) c. O(n) O d. 0(1) What is the Big-O time complexity of the following code: for(int i=1; i<N; i*=2) { ... constant time operations... Select one: O O a. O(n^2) b. 0(1) c. O(n) d. O(log n) O What is the Big-O time complexity of the following...
Explain what each line of the following snippet of code does: int *ptr; ptr = new...
Explain what each line of the following snippet of code does: int *ptr; ptr = new int; *ptr = 10; cout << ptr << ' ' << &ptr << ' ' << *ptr; delete ptr; cout << ptr << ' ' << &ptr << ' ' << *ptr;
I want to know what is wrong with this code, and how to fix it please....
I want to know what is wrong with this code, and how to fix it please. i keep getting Error using contour (line 48) Z must be at least a 2x2 matrix. Error in Projectrevised (line 42) curve= contour(b,FOS1,h,'ShowText','on'); %% Constants w = 450000; l = 10; n = 6; SOM = 505000000; max = 10; min = 2; diff = (max-min)/n; FOS1 = zeros(n,n); FOS2 = zeros(n,n); i = 1; j = 1; Vm = (w*l)/2; %% FOS@different base&height...
Using MATLAB please.
A = rand(m,n)
x = rand(n,1)
b = A * x
1. What does the following code compute? Explain what operation the third line is per- forming b = zeros(m, 1); for i = 1:m b(i) = A(i,:) * x; end Make a copy of the relevant MATLAB function you wrote earlier, and use this code in place of the two loops you wrote. Time both codes on a sufficiently large problem. Which performs faster?
Explain each line of code. What does the routine do. model small .stack 100h .code main proc mov BL, 36 yor BL, 40h mov CL, 16h m: mov ah,6 mov dl, bl. add DL, CL int 21h dec CL jnz m mov ax,4C00h int 21h main endp end main Good luck!
Question 2 (a) Provide a single line of C++ code that will declare a variable that points to a string value, the variable is named x. [2 marks] (b) You have array c declared as string *c [5]; Give the single line of C+ + code that will assign the string pointer stored in variable x (from above) to the third element of the array c. [2 marks] (c) Write a for loop that initialises the contents of each element...
In the MATLAB code below what does the line:
A(i) = 0;
do?
Is A(i) just a variable or does in index something?
P=1000; r=0.01; n=1; f for loop to calculate monthly interest and yearly interest for i=1:10 A(i)=0; for j=1:12 Am=P* (1+r)^n; P=Am; end A(i) = Am; end % display the amount compounded annually for 10 years i=1:10; table=[i', A']; disp('year Amount') fprintf('%2d %6.2f \n', table')
Please provide code and final answer.
The code provided solves the boundary value problem 2 dr2 cos(a), J(1) , y(5)2.on the interval Toxksusing a Centred approximation of the derivative term and N= 100 nodes 1 we% Matlab code for the solution of Module 2 3 xright=5; 4 N 100; 5 x-linspace(xleft,xright,N); x x'; %this just turns x into a column vector dx- 7 (xright-xleft)/(N-1); %If theres N nodes, theres N-1 separations . 9 yright 2; 10 here is the matrix...
Using C++ please explain
What is the Big-O time complexity of the following code: for (int i=0; i<N; i+=2) { ... constant time operations... Select one: o a. O(n^2) O b. O(log n) c. O(n) O d. 0(1) What is the Big-O time complexity of the following code: for(int i=1; i<N; i*=2) { ... constant time operations... Select one: O O a. O(n^2) b. 0(1) c. O(n) d. O(log n) O What is the Big-O time complexity of the following...
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